Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c63c03c60d5595…

MALICIOUS

PDF

51.3 KB Created: 2020-08-24 01:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 624430b2433857127e19530278827492 SHA-1: a7dd3a96c355b6c7d888d24c336394484422c5e7 SHA-256: a8c63c03c60d559525ec6acf4b45c121b070fc0a803f4d52cc06f15ecdd16d0a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one heuristic firing indicating it's a malicious redirector. Another heuristic identified a link farm structure, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains text related to urgency, which aligns with the 'SE_URGENCY_LURE' heuristic. The primary malicious URL identified is ttraff.ru, which likely serves as a gateway to further malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=sindhu+bhairavi+film+song In PDF document text
    • http://files.radcommorgchart.com/uploads/1/3/2/6/132681690/ziwur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/16138925689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4738/6262/files/jenuzevigatotedezarobixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/windows_10_snipping_tool_shortcut_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/89572104561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/42797149482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7670/files/34754183556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/difference_between_active_and_passive_immunity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/78554223068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3680/1181/files/vujokexorejetobabotusosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/nutozavapibesafavuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/libro_introduccion_al_budismo_gratis.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF6 5624 bytes
SHA-256: 53243bf6200309ca41be90f08c6060e7ec38a314e736aa46134a536c3653c366
font_01_sfnt_off00008ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDF 4320 bytes
SHA-256: 5940bdf4802400d5149e408957887cf730ea3076b578404196bea34e4d04f099
font_02_sfnt_off00009d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3B 10192 bytes
SHA-256: 22bb76f5d55e812851950523c251abd5a6b5347a81e1faa1cf121b1071b0ea40

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