Malicious PDF — malware analysis report

Static analysis result for SHA-256 935ca76f645bf109…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 07:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b02801e064d1d2e5410012f5bfd393d1 SHA-1: 5d02accdc98c8a1c8bb70ec7df3ded723971c2c3 SHA-256: 935ca76f645bf109d5fff740a41b810f7eb2df779e16dbe5c522e5cb25b419ab
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised within the document body, aiming to lure users to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic. The ML classifier strongly indicates malicious intent.

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/wb?keyword=pet%20speaking%20part%203%20pictures%20pdf In PDF document text
    • http://files.completewellnesscenter.net/uploads/1/3/1/8/131871745/cae1df.pdfIn PDF document text
    • http://files.normawalton.ca/uploads/1/3/1/3/131379312/bb7627f.pdfIn PDF document text
    • http://files.chehandbells.org/uploads/1/3/0/8/130874429/salimemupepukevoxof.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/1/0429/5373/6351/files/xubexezejazedozed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/7390775150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/63393534473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/tubejeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/tenasorosegonojerivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/butojiwafelotepogewedalew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/letter_d_worksheets_for_kindergarten_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/cancionero_para_guitarra_principiantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/10003139382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/98165731327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/volukebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0715/5110/files/blackpink_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/fibras_textiles_naturales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51439980706.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_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 5520 bytes
SHA-256: 399b7e4d8d570ef63f252f554a13bd14d411f4778bad2d92c91d55aa398e3aa5
font_01_sfnt_off0000719a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719A 11344 bytes
SHA-256: 1e8a94775992603b4ca05fe44bcaf3de975a826becb466854bca17e0682a7f76

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