Malicious PDF — malware analysis report

Static analysis result for SHA-256 413b54edbc138eaf…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 15:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c0fcbf441ccc5b6bdafdc892365726a SHA-1: 5374ffd217cd6ab97a84acfb189f9ef802ee11fd SHA-256: 413b54edbc138eafcea97f0bf23e475fca223edc29d994241a191899ec46ed41
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to ttraff.com, which is known malicious infrastructure. The document body suggests a lure related to 'Oxford dictionary download pdf english', likely to attract users through search engines. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=oxford+dictionary+download+pdf+english In PDF document text
    • http://files.itsrealmagazine.org/uploads/1/3/2/3/132303378/bejake.pdfIn PDF document text
    • http://begibale.findlaybooks.com/uploads/1/3/0/8/130874254/kidadiribi_zakulur_juwekemege.pdfIn PDF document text
    • http://files.stevenvest.com/uploads/1/3/1/4/131453749/kolalelol.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/1/0435/3907/1125/files/nimaweziwafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/98990337122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/91594216751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/53195810004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0919/files/3541207741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/64764723202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/racconti_brevi_per_ragazzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/52926388523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/panasonic_6._0_plus_manual.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 1

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_off00006601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6601 5704 bytes
SHA-256: d715cb4b63763a337c7436556090569546fbc0968cb00f6d1a7ba745f9dcc05a
font_01_sfnt_off0000798f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798F 10468 bytes
SHA-256: da315005a13abec07c9ddfed1b07062a3ca77a513e1f358b83189eaa293a26e5

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