Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d2fce9c39f6818…

MALICIOUS

PDF

40.3 KB Created: 2020-08-07 16:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffbe225b915937f1f742cc036ab5b053 SHA-1: 89fe688f23a0800204ccb3d759c6b639e5a8b4cc SHA-256: a8d2fce9c39f68185db933d2e338d7c055a215ca0b41abbfc893877d87597950
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. This indicates a link farm or redirection attack designed to funnel users to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=posiciones+y+cavidades+del+cuerpo+humano+pdf. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=posiciones+y+cavidades+del+cuerpo+humano+pdf In PDF document text
    • http://files.plazaproduce.com/uploads/1/3/1/3/131398145/164a7.pdfIn PDF document text
    • http://difoz.mrsmoothbeatz.com/uploads/1/3/1/6/131637309/7b34fd57c.pdfIn PDF document text
    • http://files.radyo-filipino-australia.com/uploads/1/3/0/7/130738841/fazilalu.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/1/0430/1537/2949/files/bhendi_bazaar_redevelopment_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/rebaxoxokivomifogalolorib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/angie_martinez_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/40242926331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/jevugipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/dedevinozajupakuzumotavoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/totedogaxotibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/84002154898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/alice_in_wonderland_partition_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/tomixoxeg.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 5

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_off00005c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 5560 bytes
SHA-256: c5125be91e92cda2fcc1683f3f81fb0ba77690bba24b1b20a60303ce906a5fe2
font_01_sfnt_off00006f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 10900 bytes
SHA-256: b01ebe3bef6265ff70c15166499166ed7c26618d5f55c4a52d16c40a78791022

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