Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fb69599c4275b8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 20:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cb7316d06e0e477030a7864e33505bd SHA-1: fb60590e2e54902ad0c699ce9c47e40b836152ec SHA-256: 15fb69599c4275b80f27944651615ba841b73f655207925fc224026f9a76144c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. A critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the lure to download content.

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.ru/pify?keyword=adobe+color+printer+utility+mac In PDF document text
    • http://files.walkthruyoga.com/uploads/1/3/1/6/131637037/c44f62.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/1/0438/3395/0358/files/causative_active_and_passive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3054/3512/files/dexijumajutavijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/subject_verb_agreement_quiz_with_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/rafezubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/756677024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dogagogekugubetopisebazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/frozen_fever_full_movie_720p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/sample_readme_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/pimimozalemufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/midas_m32_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/33490455499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/647973840.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 4

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_off0000602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5272 bytes
SHA-256: ec0a894ddf388d1c0e2d01d8f2e54d1a5bf07eaa13697fe170f61f535efae2f8
font_01_sfnt_off00007201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 9872 bytes
SHA-256: c2fc9640bd97c810e996985bbb51888bb432d73c6bb0c5687f1ebc5a0c4b215d

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