Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bc936a7af3839d…

MALICIOUS

PDF

38.0 KB Created: 2020-08-11 23:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69d984af3a9194dec0c5a78949fed0e1 SHA-1: df99bf1eca8b3a873330bc1aa02c25fa734e23cb SHA-256: a1bc936a7af3839d9eb77d7ffa5ebb892e770edd2e5f4ca17a071acb0229966b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains a URL that appears to be part of a phishing lure for a "machine synchrone pdf exercice". The ML classifier strongly supports the malicious verdict.

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://ttraff.cc/wb?keyword=machine%20synchrone%20pdf%20exercice In PDF document text
    • http://files.stitchesbylynsey.com/uploads/1/3/0/7/130738499/7513939f.pdfIn PDF document text
    • http://kizerezo.deltamoonsoap.com/uploads/1/3/2/6/132695471/duwuzew-vewusev.pdfIn PDF document text
    • http://giruti.orphan-girl.com/uploads/1/3/1/4/131407995/b436c15589.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/1/0433/0687/7080/files/85986419962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/law_firm_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/27251215331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/javezujus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9069/files/mortal_kombat_super_nintendo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/kilabetugizodenaforeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/2009333746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/jesobewolibutoxewoxavimil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/pegaxewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/cambios_psicologicos_en_la_adultez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/8301191272.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_off000046e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E7 5092 bytes
SHA-256: b532b3a3a14082e1dfd9618d3e18fb0c824aa770d6f625dce082255939849333
font_01_sfnt_off0000582b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582B 11088 bytes
SHA-256: 480f12c5d79a6c18a78841de64314c7fc4cfd46bccc78772d270082f1510d58d
font_02_sfnt_off00007b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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