Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff198ac9b34e7a4b…

MALICIOUS

PDF

48.4 KB Created: 2020-08-13 08:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 975d71e926b717df0458434ebaa5cdf2 SHA-1: 41c1df92ae30efa85b085561facdb00c47a84cd8 SHA-256: ff198ac9b34e7a4b715193a419b4c033204cb393847f6783f9f766e64a1d1d84
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=apostle+peter+biography+pdf'. This indicates a social engineering attempt to trick users into visiting a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to obscure the true destination. The ML classifier also 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=apostle+peter+biography+pdf In PDF document text
    • http://files.theartsinguthrie.org/uploads/1/3/1/4/131454916/e44b7ebd0e2275.pdfIn PDF document text
    • http://files.stcloudchurchofgod.com/uploads/1/3/1/4/131453615/gofewinuxodo.pdfIn PDF document text
    • http://files.parrasrobotics.com/uploads/1/3/1/4/131406391/nawidojudijimas_mopebitif_bipegobusigowup_titoranem.pdfIn PDF document text
    • http://files.buffalozen.org/uploads/1/3/1/3/131382243/zubevuxoka.pdfIn PDF document text
    • http://files.citygroves.com/uploads/1/3/0/7/130775260/gokimofapapobagog.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/1/0431/8583/2096/files/bifiritipimubewumifake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/el_aire_que_respira_brittainy_c_cherry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/31906881314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zejusokojuberuvuzakos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/punijud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/93992948939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/47995859474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/dobokavab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/zilusele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/wuteruvizofuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/18163269112.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_off00007ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 5532 bytes
SHA-256: 240d52fc5bfd80eba29e434a30edb681ee7dabd73d6a3985ec2410f5a47f9cd3
font_01_sfnt_off00009198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9198 10316 bytes
SHA-256: 03ef1f8d00a39d04fcf3dbec22a1ea45127dcae8519bb098633919e219e3391e

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