Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c213611c5a933e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 19:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 651eb86c4be8ed8a424615c8e54744a8 SHA-1: a37612cc9dfc54385e4df525f79bc3acb2bbac14 SHA-256: a4c213611c5a933e5ec8d910ce62a53ddd4d1608c8a9f6507817f69cf228a5ca
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented as a link to an English grammar PDF, but it redirects to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host malicious content.

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=english+grammar+basic+rules+pdf In PDF document text
    • http://files.hooverdamnotes.com/uploads/1/3/0/7/130739146/6219677.pdfIn PDF document text
    • http://guparu.creativeartsoasis.com/uploads/1/3/0/9/130969754/sifovig.pdfIn PDF document text
    • http://files.aimeeswenson.net/uploads/1/3/1/8/131871705/9669054.pdfIn PDF document text
    • http://potezalu.fifecarerscentre.org/uploads/1/3/2/6/132681647/xuguwogezuv-furad-buzenixanin.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/1/0432/9829/1870/files/pomajep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/22433193693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/9674590730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/81552338489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7779/1897/files/john_deere_hydro_185_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/download_bnf_75.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/xilirasodonisogid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/4587368966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/15138940828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/3117137520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/dawn_of_war_dark_crusade_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/tigogixoneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/xamamafepumawemomakugadi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 5668 bytes
SHA-256: c2a52e44cab47a1363a5672b9b2ec91f5c7edf569450924d0230fb97946cf6e8
font_01_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 10096 bytes
SHA-256: 272464a3833eb35b2f1cf431a31fd07fdee6a83433860d000dc38c0dd8bbe46b