Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c07c1f070ce5e8b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-26 09:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c24dc561d4b77a6097206b55e5668f87 SHA-1: 539bfe23e88f71a01b5c790c14d275b128dde873 SHA-256: 8c07c1f070ce5e8bc7a0153a103d7dbf12cd516da132d39521929ee0fc2dcd62
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the redirector's malicious nature. The 'SE_INVOICE_LURE' heuristic suggests the document is designed to trick users into clicking the links by posing as an invoice or payment request. No scripts were extracted, and the document body was largely unreadable, but the link farm and redirector are strong indicators of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=canape+abatible+yecol In PDF document text
    • http://teduga.b-dogdesign.nl/uploads/1/3/1/4/131406535/6897724.pdfIn PDF document text
    • http://files.dkgindiana.org/uploads/1/3/1/3/131379899/5456504.pdfIn PDF document text
    • http://files.ontracksimulation.com/uploads/1/3/0/8/130874201/vafodadonaz_taxivawidifogu.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/1/0431/8239/1451/files/wolutujurokeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/mathematics_for_management_and_finance_shao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/aromanian_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/54400615658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/phonics_sounds_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/74306781127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4066/0891/files/44593280015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/72755517712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2816/8359/files/pan_africanism_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/70324940415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/speak_english_podcast_com_004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/sivutixuvabubegudigalafew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6598/0581/files/doweja.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_off00005e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 4800 bytes
SHA-256: 008c1d96022402d6a75604a6815f1f8870873399cbd91c72876a8090a0b941a0
font_01_sfnt_off00006e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 10740 bytes
SHA-256: ea4e5a06371df8bfd8ef0812ddfa7848fd16b37bb883a245ce76a318225e14b5