Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8baab0174ac1213…

MALICIOUS

PDF

48.2 KB Created: 2020-07-31 17:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01a3b327673e5d69d6b0bc5d0b290f43 SHA-1: cfbeefcd0e19883baf4aff6d6ad70dca869b725d SHA-256: a8baab0174ac12132a571d3d97d51d82546e330a133fabe3dc39e053ebbfb9aa
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=mercruiser+service+manual'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious.

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=mercruiser+service+manual In PDF document text
    • http://files.wesparklearning.com/uploads/1/3/1/4/131482950/b5457a5e4fa92.pdfIn PDF document text
    • http://files.pregrownhedges.co.uk/uploads/1/3/1/4/131407445/bozenimala-sunizidexenod-datupufagutum.pdfIn PDF document text
    • http://files.readingdoubleglazing.com/uploads/1/3/1/3/131379678/4904425.pdfIn PDF document text
    • http://files.kcsaussies.com/uploads/1/3/1/6/131606035/4790224.pdfIn PDF document text
    • http://files.adventuretimes.co.uk/uploads/1/3/1/8/131856991/5927790.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/1/0430/5354/7677/files/guresosupifobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/16719001454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9601/3990/files/doboloxamotog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/parawoteginogenekuxizulex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/fopozexusofuxudoxidupor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufabolip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/pikol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/72936220904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/mekowofonobupopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/polasisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/xeviguwazawaxadudefudiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/firotat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/3825269094.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_off00006fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 5008 bytes
SHA-256: 392d5deb7686823ccdb44f6e9ccbab0337e2aff774be51e43bf2b49ffaa9bb3b
font_01_sfnt_off000080d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 15992 bytes
SHA-256: 2676f0266331e618f214893d755a872d58dcb39cdf45a4924d5dbec33cd72aa2