Malicious PDF — malware analysis report

Static analysis result for SHA-256 42207cddd87c38ba…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 14:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 512819e77b8297c6f2dcb9816509e444 SHA-1: 4b4a739e9e8f159b2e77a71b363241d0557b9a0a SHA-256: 42207cddd87c38bab5b0b1afb3dce4b5e41bab456fa416ef2275557b321cce20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a high number of embedded links, many pointing to benign content, but one critical link redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains keywords related to 'Toefl exam format pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links, including the malicious one, indicates a link farm or redirector strategy.

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=toefl+exam+format+pdf In PDF document text
    • http://files.covid19atf.org/uploads/1/3/2/6/132696048/vosekosimerog.pdfIn PDF document text
    • http://files.fraserlegendsfishing.com/uploads/1/3/1/4/131483305/vebodavu.pdfIn PDF document text
    • http://files.byuiprearrivalmentoring.com/uploads/1/3/0/8/130813696/lewagolage.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/1/0437/4118/4165/files/blood_pressure_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/52034715074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/24577149545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/the_righteous_mind_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/28119997700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/86914338026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/kuropijajofapusidulozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/76560534072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/12550872952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/11930070932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/bugekodewut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6580/7772/files/python_language_in_urdu.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 5

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_off00007693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 5028 bytes
SHA-256: af023439c9d462e3ef6f60ad46478909dc6f95637ee5c238e063fff4bd153c31
font_01_sfnt_off000087a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A2 10136 bytes
SHA-256: e27189d05eed97941623d23a01c1edcb1d541482e32814e438e8f412297d4ac2

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