Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca054815a09669d4…

MALICIOUS

PDF

34.7 KB Created: 2020-08-01 13:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb63650246e0473590ed46690a789ca5 SHA-1: 2ef10d4ebbc0b4f8ca5da78b1f02d89789e1052d SHA-256: ca054815a09669d4a967d5b183d35dac31e9bfc797cfb2a960f736f448bc15c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a large link farm suggests an attempt to lure users to external sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer the attack pattern.

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=zelda+n64+rom In PDF document text
    • http://files.logosassociatesltd.com/uploads/1/3/0/7/130775102/4698029.pdfIn PDF document text
    • http://files.mullinsliquidations.com/uploads/1/3/0/8/130874019/vugafulapezi-taxesofukonakup-xasedak-jipuxa.pdfIn PDF document text
    • http://files.lymefilm.org/uploads/1/3/0/8/130874544/wafamakisexise-baduda-dirivazebo.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/1/0433/1690/4104/files/79336605858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/faluvamiriselojugusabar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/redijagaresunufuvosuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/wiwijof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/xogusoxakinobimopobul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/74133433484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/dunefiregonetazalomupeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/zizesugadafugawepamumas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/xezibawuketisepulax.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 6

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_off00004ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC8 4992 bytes
SHA-256: 468f9429056663328e022ac35f59858d30b196654ccade741372760836fd5f2d
font_01_sfnt_off00005bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB1 10188 bytes
SHA-256: 0ab7d305b8b9c16cef2a80ddfeb9ed803ed3eab69b32ee3bdd4cafd76ff98d19

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