Malicious PDF — malware analysis report

Static analysis result for SHA-256 de91ba801b6b1f82…

MALICIOUS

PDF

52.4 KB Created: 2020-08-19 10:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb0729e2a6aa10dacc1f8f3b9fb9a59c SHA-1: ecfe2d6ab520c743d746d929aad2816c3faf1293 SHA-256: de91ba801b6b1f82817a161beecc98d6ef4b0f4f748d7407ebd7d4a319e8cc5a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=remington+steele+episode+guide', which is a critical finding. The presence of numerous links, many pointing to shopify.com, suggests a link farm or SEO poisoning technique to distribute malicious content. No scripts were extracted from this sample.

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=remington+steele+episode+guide In PDF document text
    • http://files.secondwindpdx.com/uploads/1/3/1/4/131454603/1497737.pdfIn PDF document text
    • http://files.forgetmenotsmovie.com/uploads/1/3/0/7/130775840/gimewov.pdfIn PDF document text
    • http://files.starfishlbicharters.com/uploads/1/3/0/7/130775544/zojiza.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/1/0433/1978/7675/files/ff14_focus_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2010/8444/files/nijirolebolekemajurajefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/63000286698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/2937269777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/30529928110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/83907516628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/algebra_2_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/benjamin_franklin_autobiography_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/vebawubulemisubojijedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/73236355667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/77737399999.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 2

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_off0000911e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911E 4980 bytes
SHA-256: 2285649e5ab6cd965581606ecd5c9465f6d00eea5cd741332a4ce2a17bb8a4c2
font_01_sfnt_off0000a206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA206 10172 bytes
SHA-256: abf64e04cdceed745976baab4fbc98579f5b82fac97fd47084357fd61c9ce247

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