Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c99eeb37bc3c22b…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 15:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5d73fa5023927e2915f4ad4191bd7b5 SHA-1: 9bf9e8956674108603b912560ebef4bae02d4923 SHA-256: 5c99eeb37bc3c22bf615b635bee4e514049b601ccc35ff600ed1fbc1ac3c7138
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.cc'. This suggests a phishing or scam attempt, likely using the 'lagu rhoma irama begadang 3' keyword as a lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms the intent to lead the user to a potentially harmful destination.

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/pify?keyword=lagu+rhoma+irama+begadang+3 In PDF document text
    • http://dafavavu.juliahobdayphotography.com/uploads/1/3/1/3/131380213/zilufipawop_xudizurividise_nabitegamunibi_waxaxamijipugop.pdfIn PDF document text
    • http://files.buzz4bugs.com/uploads/1/3/1/4/131438471/8342686.pdfIn PDF document text
    • http://rigapefit.magdalenakarlick.com/uploads/1/3/1/4/131407535/3179545.pdfIn PDF document text
    • http://files.unionvalleybaptist.net/uploads/1/3/2/6/132682528/pilidaruxofadopekupa.pdfIn PDF document text
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/10553476472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/jepolijivajevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/que_es_la_anemia_y_tipos_de_anemia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/13432831048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/3420319461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/62229433302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/45848113683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/physical_science_concepts_in_action_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/64922774671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/donawexopiwupupugote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/diagnosis_of_ischemic_heart_disease.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 5276 bytes
SHA-256: 25b12f77c3f274ada55e9df6e8ce50fe80e8a4d53b3b4f5752e0169267c6dd0d
font_01_sfnt_off00006fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDC 9852 bytes
SHA-256: 50e95a11d65b5133d6685058c6ee74167d520da7bc5a24406cb9e82036cf11bc

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