Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1fdbb5b0dcc839…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 11:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96ab72f152239cbae1899cee007bad13 SHA-1: af04b97046dc7b8967b415a0ce70ec754483f282 SHA-256: 9f1fdbb5b0dcc8398620c252a703bc6e06f7232cf425e0ecdb4504524d5dd117
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, contains text related to 'Metformin xr gi side effects' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site disguised as information. The ML classifier strongly flagged this PDF as malicious.

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=metformin+xr+gi+side+effects In PDF document text
    • http://files.sierpefrogs.com/uploads/1/3/0/8/130874587/wugerizobe_moloborimufin.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/1/0432/8567/6188/files/tozasuneveludadimabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/concepto_de_defensa_nacional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/memepid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/woxadagenus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/34314147551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/swg_afk_grinding_spots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/article_grammar_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/goviwejesuwepewokigoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7863/2095/files/92626847094.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 3

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_off000065be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 5172 bytes
SHA-256: ab4f7d37dfef566b54da621b1f2458f875f59de10d6d72a20b08ed918b851498
font_01_sfnt_off00007757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 10328 bytes
SHA-256: b81ccd71c8aba49e13395e1228d19031afdffa961b0b7c2f9371f1a89babe63c

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