Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5181c64cbd696d9…

MALICIOUS

PDF

47.0 KB Created: 2020-08-03 13:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64b08fce0cec45bae06d77bbd119e812 SHA-1: 73ed93c3be95eb2f7aa27e0b2f90587bc5bd8dd7 SHA-256: b5181c64cbd696d9859fa3412858adc59d10eb07821751e28bf3d8535e9fed50
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=adsorption+capacity+of+activated+carbon+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a broader SEO poisoning or content-scraping scheme. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify this as a malicious document.

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=adsorption+capacity+of+activated+carbon+pdf In PDF document text
    • http://files.washingtonguideservices.com/uploads/1/3/0/7/130776016/91757111b222b74.pdfIn PDF document text
    • http://files.dlaaero.com/uploads/1/3/0/8/130814101/misoxiwisawiwot_ledilovolo_visadawiw_gipugasonigu.pdfIn PDF document text
    • http://files.lyndatongue.com/uploads/1/3/1/4/131454355/xumekopa-genomewatepoxe-letomog-kopawipezulufi.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/1/0441/4432/8856/files/71913714652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/xelowupube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/tejonajunuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/bevuvopubipulidal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/88779352383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/jifuzarajinuraruxutofejad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/panofazojadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/23423592182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/wojakimomiminimuxojomuni.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_off00007922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 5408 bytes
SHA-256: e5aa8c8bd9e8d05f79d63100bba90731cf391f442249b06fb37b4a7724d802a8
font_01_sfnt_off00008ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA3 10324 bytes
SHA-256: e7662bde5bc3903fbc9fb1f7f1e60e8d3c320bd1085ffb2e634a9e8f0d8cc066

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