Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce5f1232d15541f…

MALICIOUS

PDF

48.4 KB Created: 2020-10-29 08:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 023279fda52480a06cf5e61a5b368b2d SHA-1: e861d49c3c249264a6405c1556f2840e0a29d71b SHA-256: 9ce5f1232d15541f007c9c51d9f9ba242cfb439df980980083291523e5d35b3f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to redirectors and SEO link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The ML classifier strongly flagged this PDF, and heuristics confirm it acts as a redirector and link farm. The document body, though heavily obfuscated, contains URLs that are also present in the heuristics, reinforcing the malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=how+often+do+blobfish+eat In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/2062198.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/kibez-sabafuno-vajoze.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/xopoliwizuxuna_zuziviragakunow.pdfIn PDF document text
    • https://tovalowu.weebly.com/uploads/1/3/4/3/134375552/gujoba-numegox-zewaro-liwudibiradus.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/902eea104d33c.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/1440579.pdfIn PDF document text
    • https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/6691844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/50394229668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc562a3-8aac-4c45-8835-388384055d56/88578294099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/78923652247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/gutunibegozufiduvudagix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8217/7448/files/bob_revolution_se_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/alien_shooter_mod_apk_sigma_team.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/0025/8462/files/fun_run_2_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f6995b-c94a-41af-b9b5-1ef74eb19124/93026219496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a2b9af-9ee8-4811-978f-a832d21d3652/2496663123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5808/3493/files/27432000902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47d2e13-8148-4baf-98ed-d8cbfd58bd25/78493054974.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/c_al_programming_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/ankle_fracture_rehab_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2028/2787/files/fagisimopagamogelap.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/62167249476.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 4880 bytes
SHA-256: b3231c1c99437e6f134deba61cae16f1464b29fb00cd185e155637f6509a845c
font_01_sfnt_off00008281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8281 10300 bytes
SHA-256: 4f1c501db3e14e05ecd6ced7efc5baad71b4e8f15ac5ba0ce41dce2bb12578c2
font_02_sfnt_off0000a5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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