Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a87279443e03b9c…

MALICIOUS

PDF

429.0 KB Created: 2020-08-17 07:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 554ee8c880de55b4cc17f13e41dc4d5b SHA-1: 149b3ffd7937561562fe05dab5d04bcd9018065b SHA-256: 8a87279443e03b9c28a82b2375919730ff726396e57f849b54f543830a9ce386
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector, specifically linking to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=aha+guidelines+nstemi In PDF document text
    • http://files.repnstep.net/uploads/1/3/1/3/131378953/gilokez-vunoxe-kiroxuleva-nowiropinekol.pdfIn PDF document text
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdfIn PDF document text
    • http://files.drmorgannd.com/uploads/1/3/2/7/132711965/7101705.pdfIn PDF document text
    • http://files.dragonmoononline.com.au/uploads/1/3/0/7/130739987/303af056f90.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/1/0430/7868/0730/files/70401263631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7103/5809/files/banimefisaxamisaliputogul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/sap_accounting_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/lonosugabilurisebobuwola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/fafubikojovaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/govome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/zemukarekara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/99346767594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/mewibolomowemenepaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/divination_cards_poe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/sasasajukixituzakezap.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_off00065b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B74 5132 bytes
SHA-256: f8f40a7164c7f10719a305d99d4a02202aa6388155e69bcdd28b28539fc90cc4
font_01_sfnt_off00066cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CBE 17928 bytes
SHA-256: 400da225bebb6badcc17611d0dc0e602cebd64a12e11bb761a684641ee418b3b

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