Malicious PDF — malware analysis report

Static analysis result for SHA-256 9521e322043db8dc…

MALICIOUS

PDF

51.5 KB Created: 2020-07-30 22:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8343308b953feb2b65201302a405b1fe SHA-1: fc1ec5af3e769d7995f3e8035bdebab87d04248e SHA-256: 9521e322043db8dcc44b4dfa2301635b5b8947974c154c7bcc40efa883fbb879
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The primary malicious URL identified is ttraff.ru, which is used as a redirector. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation and mathematical formulas, likely serving as a lure to disguise the malicious links.

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.ru/pify?keyword=basic+formulas+of+mathematics+pdf In PDF document text
    • http://files.yewmountain.org/uploads/1/3/1/4/131453136/6337845.pdfIn PDF document text
    • http://files.wvswma.org/uploads/1/3/0/7/130739288/vukogotutifived.pdfIn PDF document text
    • http://files.2020glassplus.co.nz/uploads/1/3/2/6/132695832/duxofuzo.pdfIn PDF document text
    • http://files.jocelynpearsoncoaching.com/uploads/1/3/0/7/130739401/fetijag_feboxe_fezufod.pdfIn PDF document text
    • http://files.spiralingupsolutions.com/uploads/1/3/1/4/131406781/salape-nusidemak-nobegukasu-kokavo.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/1/0427/7056/3239/files/fagejow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/26941528698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/dotinavunenakoregitusola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/nudoxepufubokunejafegoduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9635/6504/files/76773271591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/96315352232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/vegevebilesotiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/5368277549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/91047547505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/11967841039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/kizaviruz.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_off000083a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A7 5220 bytes
SHA-256: 889a093088b0cf720f9b6c015f49d655e40099657dcc9a9d7795b652a1fb312d
font_01_sfnt_off0000955a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 13972 bytes
SHA-256: aafdc857ec0149d200d7f0188c7c9df6b3c4fd99ce4290400bde578fbdbe8b2d

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