Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca7f028e9756845…

MALICIOUS

PDF

48.8 KB Created: 2020-08-15 00:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed4aa56eea3efefed4b5b86fe9ae673b SHA-1: 992f57bf5a207aeddaf9b001c34dd8128ad4cb69 SHA-256: 5ca7f028e97568452f0f41cc23602f3e3ecc53370b590467847e5cb764d1a8a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to attract downloads. A critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=audacity+manual+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.mylenebaxterconsulting.com/uploads/1/3/0/7/130776416/6319479.pdfIn PDF document text
    • http://files.communityspokes.com/uploads/1/3/1/3/131379099/nufalirofado_wenogopopi_pipilosop.pdfIn PDF document text
    • http://files.hongaku.net/uploads/1/3/1/8/131856244/470713.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/1/0430/7399/4905/files/tafebek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/43266631808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/lekodugipirifozimivuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/vifexizumoviwusobij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/tugamevab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/89287218832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/31458836679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/2520489145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/lapebinegovofawurukarawek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/cambridge_advanced_expert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/moving_forward_hezekiah_walker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/sikeniriferenilisalozeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/gonuf.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_off00007e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 5508 bytes
SHA-256: 5395b432f6ba210f9694212a90ce1053648ac5f80a1258719bf3d5cbc1c47f1b
font_01_sfnt_off000090c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 10376 bytes
SHA-256: a12078222e3abc407dac7a03b922c0e07d469ac1886c948c19a4a74311c98f97

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