Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc721f80c81c97f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-06 02:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1c669c2b660530995cf529ccd8fba83 SHA-1: c3d30f17e78f1bdd56fa16599f14d4129acb5282 SHA-256: 8fc721f80c81c97fc6490ce2fe7b36bb1dbf958f8a7021d03a472590d4232355
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a malicious redirector. The primary redirector URL is https://ttraff.ru/pify?keyword=asleep+in+the+valley+poem+pdf, which is likely used to obscure the final destination and potentially for SEO manipulation. The ML classifier strongly indicated maliciousness, and the link farm behavior suggests an attempt to distribute malicious content or phish users.

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=asleep+in+the+valley+poem+pdf In PDF document text
    • http://files.fencestile.com/uploads/1/3/2/6/132682994/savediwodavep.pdfIn PDF document text
    • http://fetinine.bigdogrottweilers.com/uploads/1/3/0/7/130739415/62bc624d274b.pdfIn PDF document text
    • http://files.ericatremblayresumespecialist.com/uploads/1/3/0/8/130874543/zanepofekelo.pdfIn PDF document text
    • http://files.triathletewithin.com/uploads/1/3/0/9/130969184/7147590.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/1/0433/0687/7080/files/50833930904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/32103638950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/11989209681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/brahmaputra_river_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/mavobogapebevemamenisot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/rupesovikanevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/suffix_ness_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/56553305325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/9516760689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.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_off00006258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5336 bytes
SHA-256: adf0a30e58ed9a034cce5873b529d4acf82b107a6a0719437a71e0e0f615b7b9
font_01_sfnt_off0000746b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 9876 bytes
SHA-256: 8f71324db5c2260dc78c85cb726bfb4d45e9860bab68e5cdf54ee75e29da86d0

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