Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37c3ff4ceb11ba3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 17:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 472a84551f2ecdb94a0b96bbee891807 SHA-1: 05341eeb5dad5230d8e37290fd8a7ab5a1c596dc SHA-256: d37c3ff4ceb11ba37a8e0a29567190726b86013fc9b82fadbd7d12c59511b66d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains. The document body itself is heavily obfuscated but contains the same malicious URL. The primary intent appears to be directing users to malicious infrastructure through a link farm.

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=tabloid+newspaper+template+indesign+free In PDF document text
    • http://files.silvastudioart.com/uploads/1/3/1/3/131383727/c2b014a40.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/1/0437/5881/3341/files/sap_basis_certification_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/rufitujoretil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/sufigixubamowakusanov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/10756943936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3398/4162/files/loxujanepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/rusofuxugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/konewepikewakogajavodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/smoke_on_the_water_drum_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/89914596565.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 3

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_off00006012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 5540 bytes
SHA-256: 33b74c490bb85a79e5e71803a176dc31d48e9607587d8ea5796f81c8e441ebdb
font_01_sfnt_off000072e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 10060 bytes
SHA-256: b6c9304bb03697f1dc6c667836992711745cda636d4e790f7498b4d79a055665

Open this report in the interactive analyzer, or submit your own file for analysis.