Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8d6b421806de55…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 00:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ed37e1f4696e93434078ebeb5ef139a SHA-1: 07032c4fc73f1d727658d0aa30ecd34049965fd1 SHA-256: 4f8d6b421806de553f360155ac5d9194d5e48f21184834eb5bc6d5145f909910
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a mass external link farm, with a primary link redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=larson+algebra+2+extra+practice+answers', which is flagged as a malicious redirector. This suggests the document's purpose is to lure users into clicking the link, leading them to potentially harmful content.

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=larson+algebra+2+extra+practice+answers In PDF document text
    • http://katov.carlsbaddesal.com/uploads/1/3/2/6/132681513/6094479.pdfIn PDF document text
    • http://files.businessmeetsbombshell.com/uploads/1/3/1/3/131380045/naxinimopo-fimetis-tidaj.pdfIn PDF document text
    • http://rarujinaf.objectpages.com/uploads/1/3/1/4/131453872/jogadug_falerun_visimuleve_fibawesazu.pdfIn PDF document text
    • http://files.bokobowls.com/uploads/1/3/1/3/131398008/jigekit_gakubifef_mazetisudoxovep_gumopivojeri.pdfIn PDF document text
    • http://jotam.studiojsd.com/uploads/1/3/0/7/130740592/3410306.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/1/0432/0660/7005/files/wanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/pet_insurance._co._uk_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2545/7574/files/english_lessons_for_elementary_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/xijaluzedetekoxuduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/1064676919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/appearance_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/vixenewutagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/occupational_safety_and_health_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/91992452272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/ziwav.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_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 5260 bytes
SHA-256: ddb4298e92a47475f71c46e666dff3952fd8a70e1afa71db458d18fde7e5c5da
font_01_sfnt_off00008998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8998 10332 bytes
SHA-256: 3ae88ae78f9f088d2f595e426208e4b10d8285c1b41b1568a8f0a92edb8dfd12
font_02_sfnt_off0000ace5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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