Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a6d8872e9679cd…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 04:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78fff9d74e4baf6a9d849c4a2dd1854c SHA-1: 777390ed5dadd385a814ae8a9d27ad2e8735019d SHA-256: b1a6d8872e9679cd593444f14be133fa75e99ee8459ce875f1facba69be49d61
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=como+funciona+o+cerebro+humano+pdf. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a deliberate attempt to disguise the malicious intent behind a seemingly innocuous topic.

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=como+funciona+o+cerebro+humano+pdf In PDF document text
    • http://files.philweasley.com/uploads/1/3/1/3/131380889/bokipawowulaw.pdfIn PDF document text
    • http://files.mwsphotostories.com/uploads/1/3/1/1/131164251/9992931.pdfIn PDF document text
    • http://files.aximity.com/uploads/1/3/1/3/131398374/rulazajupusida.pdfIn PDF document text
    • http://files.mydaughtercreations.com/uploads/1/3/1/4/131409677/lasojodagixu.pdfIn PDF document text
    • http://files.warungfalafelbali.com/uploads/1/3/0/7/130738596/2439144.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/1/0431/5322/7936/files/37063082891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/gonarizekipojesol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/mutogomesofetuwijozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/9740702790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/51465263250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/matura_angielski_poziom_rozszerzony.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/57755423053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/zagegolufiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.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 4

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_off00005df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5232 bytes
SHA-256: 91649af0d96eb910bf3506d2634673785f86fc912a4d1798226dd87f80fd13a1
font_01_sfnt_off00006f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8B 11276 bytes
SHA-256: 76333ddf4fc3aecb462552c30430035877c6ed0c252b64668c6782cd9ead95f1

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