Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9387b1cde30aff…

MALICIOUS

PDF

46.1 KB Created: 2020-08-09 02:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 311bd4065c58122875e40701cb42be38 SHA-1: 68926c6c4a5a2b5942effcf7a80798833a90f316 SHA-256: 3f9387b1cde30aff51306a7a0730d28bd7704fcc925b0564074fcaa5142998d6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to 'ttraff.com' which is known malicious redirector infrastructure. This suggests the document is part of a link farm or SEO poisoning attack, designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=chava+kadambari+in+pdf+format In PDF document text
    • http://vumuri.katieargyle.com/uploads/1/3/1/3/131398140/2787820.pdfIn PDF document text
    • http://files.christthevictor.org/uploads/1/3/2/7/132740288/c107377e.pdfIn PDF document text
    • http://files.embellishlashandbrowlounge.com/uploads/1/3/0/7/130739991/godibimanoja.pdfIn PDF document text
    • http://files.waco-review.com/uploads/1/3/1/6/131637104/lotumu-mogozadav-wumavajeponawox.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/1/0431/0653/3527/files/zezamilemuparumakunasuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6635/9962/files/51173425884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/understanding_binary_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/ramesalisofosexuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/32850147773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/afman_23_110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/pomevafopubekim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/life_expectancy_of_building_components.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/coreldraw_to_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5645/5067/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/sejarah_bani_abbasiyah.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 6

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_off000075db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 5240 bytes
SHA-256: 657b3c33f2e49e750863371d7869668affc86d97b620abd38cafdb8d0e1a9560
font_01_sfnt_off0000877c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 10740 bytes
SHA-256: fa7a1535a33c1bf41b8ec180edf1953718ca85f9d5e22a02093d4927fe733120

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