Malicious PDF — malware analysis report

Static analysis result for SHA-256 802e87dd113815eb…

MALICIOUS

PDF

81.5 KB Created: 2020-08-26 12:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a428339990bdcefcada1dc4df5c6fe9 SHA-1: 9e0ea9bf0c492a09df6bebce39a0c2c3ed1186a9 SHA-256: 802e87dd113815eb78d813a34f3790d11a6fed8269276e04605b02161047348f
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector and part of a link farm designed for SEO abuse. The primary malicious URL, 'https://ttraff.ru/pify?keyword=cogs+160+ucsd', is directly linked to a known malicious redirector. While no scripts were extracted, the document body contains a reference to this URL, suggesting it's the intended destination for users who open the PDF. The ML classifier strongly supports the malicious verdict.

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=cogs+160+ucsd In PDF document text
    • http://potem.rsyc-indiana.org/uploads/1/3/0/7/130739723/pasururepi-duwodewovav.pdfIn PDF document text
    • http://getosa.wekeepyoumotivated.com/uploads/1/3/0/7/130739287/6037708.pdfIn PDF document text
    • http://files.newenglandinjectors.com/uploads/1/3/0/7/130775565/498990.pdfIn PDF document text
    • http://jalisix.ocbadminton.org/uploads/1/3/2/3/132303317/4e0a831.pdfIn PDF document text
    • http://kidotuz.artbyaiste.com/uploads/1/3/0/8/130814124/1040514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/20244842676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/visetosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/362157335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/fuwojavibomiwup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/95768109197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/souncloud_to_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/ancient_history_questions_for_upsc_prelims.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/20780360318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/78326066182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/bundeslnder_wappen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 4672 bytes
SHA-256: df404b91e3642ed5413d70d724fa28983a279d253e2d1079b2a6b5f60295b2e1
font_01_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 13816 bytes
SHA-256: 33c681c342878097c5b2b0dc4b740ce787b4c0e45b579cecc09a27175111c72c
font_02_sfnt_off0001296c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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