Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8ffaf568b05f26…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 19:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f9b45b46c0dbb0454d1c9ee42517053 SHA-1: ee41cd4fb46d81d97900e0b986b111232f07b07a SHA-256: cf8ffaf568b05f26f413f4b41d1a7b7ffb936566101c7fef6fb5067d9cb9176b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same malicious URL and a list of other PDF links, reinforcing the link farm tactic.

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=auto+format+sql+in+sql+developer In PDF document text
    • http://files.redshift-consulting.com/uploads/1/3/1/1/131163969/mufulebarasebos-kepefigoxigon-rikuvali-rawajurefe.pdfIn PDF document text
    • http://files.westernenglishsetterclub.org/uploads/1/3/1/4/131437693/2479888.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/1/0430/9952/1181/files/rufogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/movarewuzetitifuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/vutekurizaxope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/99860635066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bosupokuluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/alouette_french_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/71767846417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/appareillage_electrique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/alice_cooper_hey_stoopid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/37232466833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/16787345273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/14364970594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/49710659307.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_off0000720e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 5364 bytes
SHA-256: fb4632b3236b1a251de66ceb47d60d6dca77ef3c1a938efd866d7edc4ce463dc
font_01_sfnt_off0000843d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 10192 bytes
SHA-256: 307211227937eb93e4e313b97fc823b391f577fe26257c963a149144c265c13e

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