Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7a036b55932dec…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 11:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 174cb226b0c4c75e819c7687076b6938 SHA-1: 02871473833663f75a6364b98a5a09117b88066f SHA-256: 4a7a036b55932dec121a870f554b6f667a784ca11b6dc455fab5e5225853c9a1
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. It also exhibits a PDF link farm behavior, with numerous links hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL and references to free game downloads, suggesting a lure. The combination of these factors indicates a phishing attempt designed to redirect users to malicious infrastructure.

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=avatar+hd+game+android+free In PDF document text
    • http://files.nancyjcompton.com/uploads/1/3/1/4/131454521/6d605b0d4d3.pdfIn PDF document text
    • http://gudepiki.wendellalexanderrealty.com/uploads/1/3/0/8/130814168/lafugazezovebimutu.pdfIn PDF document text
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.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/1/0428/6844/1254/files/ridabumuledanupuwisexajub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/array_in_c_programming_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/letuleta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/12th_bio_botany_practical_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/88770176773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/68609578761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/30892352965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6544/3239/files/81278495026.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_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5160 bytes
SHA-256: 1edc9518b9c9a7ff946df35a6779cbd64be8845c9a5b5bcbc3db2edb860ad8f0
font_01_sfnt_off00007397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 10472 bytes
SHA-256: cf91d4bffc98440c545294c6356c4c25132a94dff73a63ba26840cb60ea66a3e

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