Malicious PDF — malware analysis report

Static analysis result for SHA-256 a190c3aff38b79ce…

MALICIOUS

PDF

44.6 KB Created: 2020-07-31 06:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b441aa92ece36a4c23d4620990a0b834 SHA-1: 874dd39710f5448cf8e655cd5c803ffcec7a1972 SHA-256: a190c3aff38b79cea3843843ac00782a1400ad89c724ac4bd93dcc94e4e89ffb
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary redirector URL, 'https://ttraff.cc/pify?keyword=nature+deficit+disorder+pdf', is flagged as malicious. The ML classifier also strongly indicates maliciousness. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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/pify?keyword=nature+deficit+disorder+pdf In PDF document text
    • http://files.littlenecknews.com/uploads/1/3/0/7/130738753/7878996.pdfIn PDF document text
    • http://files.mcmjanitorial.com/uploads/1/3/1/4/131406356/5b2cce2e6e7ba.pdfIn PDF document text
    • http://files.happyhousepreschool.org/uploads/1/3/0/9/130969742/8655097.pdfIn PDF document text
    • http://files.steveayottemusic.com/uploads/1/3/1/3/131380600/d50fc.pdfIn PDF document text
    • http://files.teachcruachan.com/uploads/1/3/0/9/130969190/dajitiwupetitu-newelawurejot-geniwibadiru-zonelenifuwi.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/1/0430/5689/0013/files/lepilobebotonafupot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/butilupaxolipikobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/jigedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/53277864769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/fesazibumutike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/lonob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/55334306433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/gumigunuwadenaxawozudolal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/26929686381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/58050575401.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_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 4860 bytes
SHA-256: d860d1932e6bb5c83dcc4bca4c523af98d32d731d47ae697d077ad6a1be6ab68
font_01_sfnt_off00008319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8319 9948 bytes
SHA-256: 4e9762b50966f9cc43e0a8baca87b3528d9d52bb3cc6b4bd317a3e69b2a798d8

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