Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cbb633fea66d04…

MALICIOUS

PDF

50.1 KB Created: 2020-08-19 19:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1c8ae2508da49d7abb190f6e7759575 SHA-1: 747a5bb9947d7510524f59c95388eaacca023ccd SHA-256: f6cbb633fea66d04c751ef0da1fe0f418fe5f5dedb62358dec84850a4fd8e717
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many of which point to a redirector service (ttraff.ru) disguised as a free download lure. The ML classifier strongly indicates maliciousness. The embedded links suggest an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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=pass+function+as+template+argument+c%252B%252B In PDF document text
    • http://files.english-language-arts.com/uploads/1/3/1/3/131379543/9063948.pdfIn PDF document text
    • http://files.fxhugheslaw.com/uploads/1/3/1/1/131164211/137ea9925e3.pdfIn PDF document text
    • http://kepapow.landofmadmen.com/uploads/1/3/2/7/132712116/xilizikoje.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/1/0445/8138/8452/files/geankoplis_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5454/6594/files/swot_analysis_of_pepsico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/nejaziwugazodazerusokerad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/sonelaruwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/97410562297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/26652111455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5621/5702/files/23473921435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/lofabigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6540/1495/files/suwerikuzurogagifop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/saguxogidag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/tidekemuxelokifujogodinuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/smith_thompson_home_security.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/18185074294.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_off0000796c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 5336 bytes
SHA-256: 591e76f009c13404cb5c4a6b44e2e3e7a0c716d9e3b034ee847d5d7ed3280d9f
font_01_sfnt_off00008b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 15212 bytes
SHA-256: 1539d79c1d4128196e737f6ba8d5beaac2735740d44d12d83817353a72c4750f

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