Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c05df7c05f27d14…

MALICIOUS

PDF

33.3 KB Created: 2020-08-23 04:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86e463018df70a6382a2844ab52827c3 SHA-1: e8655cb00f9aa08a1502ee0825242ed6e4ffb48d SHA-256: 8c05df7c05f27d14025dd3061067c0237c784393a7205b63f24720e40e811ee0
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=os+bichos+2', which is also listed as a malicious redirector. The presence of numerous PDF links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=os+bichos+2 In PDF document text
    • http://files.peacepresbyterian.org/uploads/1/3/0/7/130775143/6d926cda8.pdfIn PDF document text
    • http://files.countrygirlgiftsok.com/uploads/1/3/0/7/130738620/jigafosipeger_dezobusasinam_bebagixavogolij.pdfIn PDF document text
    • http://files.abugslife.blog/uploads/1/3/0/8/130814258/4aa71e3aeb.pdfIn PDF document text
    • http://dibadi.nurturingtouchspecialist.com/uploads/1/3/2/6/132696414/malozu-zakosapo-zenogep.pdfIn PDF document text
    • http://files.jeskare.com/uploads/1/3/2/7/132710715/7572291.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/1/0436/7246/9669/files/nivajumeweboteluvuwabed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/95667014409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/15769323439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/phonic_song_2_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/appeal_letter_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/frozen_2_trailer_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/prebles_artforms_12th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/birthday_girl_penelope_douglas_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/42318709169.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_off00004615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4615 4848 bytes
SHA-256: 9c3c54ab7feb1add3b5bdda171540ad7b05751bb81ef0ecdb0e5b1d72569205e
font_01_sfnt_off0000568b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568B 10060 bytes
SHA-256: 63908e2376fc72642dff9a4b012eb12a36a6199d35c176c0bbb7bb01974df829

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