Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6e1d531e68db1d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 03:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8b8dd5948e7bfc65c5adb976d3ba1a8 SHA-1: 5feb611f903c2447e6f7247666837f3ae8e29eef SHA-256: cf6e1d531e68db1d0003195ead1e83f02f1c87956076541656700400c1664320
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains references to a user manual and the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results to drive traffic to malicious sites. 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.cc/pify?keyword=auralic+aries+g1+user+manual In PDF document text
    • http://files.clearfieldcreekwatershed.org/uploads/1/3/1/3/131384101/7945795.pdfIn PDF document text
    • http://zosexep.lehnhartrm232.com/uploads/1/3/0/9/130969634/bawigaporuv.pdfIn PDF document text
    • http://kagotowe.silentsoldiersofnaours.com/uploads/1/3/1/6/131606490/kamopek_sesukag.pdfIn PDF document text
    • http://misotibu.calvarybaptistemporia.org/uploads/1/3/2/6/132682646/meseverek-buvinonu-rugejajiloxos.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/1/0431/0741/8263/files/airtel_letterhead_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/68475682292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/magisterium_book_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/86788200398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8755/9833/files/lumukugifato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/31886530001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/370_amendment_bill_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/35600647670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/tesis_auditoria_forense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/bpsc_65th_question_paper_english.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 3

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_off00006fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 5160 bytes
SHA-256: ce7446911b7b053d3d3297a194e3d5b6084397956f3d17b0e97fae769cf9ba7d
font_01_sfnt_off00008121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 14596 bytes
SHA-256: ef5de3f4feda81a8be9fb1774abe8c7f70d9d0dc2bf58260a3a219202cd100b0

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