Malicious PDF — malware analysis report

Static analysis result for SHA-256 308c3bfb1bd1f8b0…

MALICIOUS

PDF

43.9 KB Created: 2020-08-17 07:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10268e47c6c5d21950518e7ee1c3a6c9 SHA-1: 7355547e61e2e2a96b58c8caea655b7e46d6958d SHA-256: 308c3bfb1bd1f8b0019829767c96636775308ab73d547376e36c97ef0c171171
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm, pointing to external resources. One of these links, 'https://ttraff.ru/pify?keyword=video+er+android+app+source+code', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain the malicious URL, suggesting a lure to a malicious site.

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=video+er+android+app+source+code In PDF document text
    • http://files.solsticemoons.com/uploads/1/3/1/3/131381003/341303.pdfIn PDF document text
    • http://files.abivaonlineresources.com/uploads/1/3/1/4/131453636/7e05af.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/1/0433/2758/6457/files/xudamuvuvopexisulesabula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/faloderixevibon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/tilenabulinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/supesifogudugegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/4551434102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/jixaloduvifogogojorovizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0143/6566/files/lirubutifeleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/sogexuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/95352077272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5420/9943/files/calligraphy_fonts_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/nexevesufaroxakobuvaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2266/0263/files/mini_budget_2020_19_pakistan.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_off00006eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 5000 bytes
SHA-256: a4ab4ad27ed190d9a51351366d88eb4ad78278fa554a0d88de0701a2b2ee2add
font_01_sfnt_off00007fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB8 10220 bytes
SHA-256: 2699ba8cd083058b1ddd871447166ae2aaa988b186e4b4f0643c6b424c752a19

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