Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4c67730d98826e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-20 01:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1cde7151703da741a6b4605688ab5ed SHA-1: a468a3e25d434c3920f7c318f392f7178b4a9732 SHA-256: bc4c67730d98826e839fae33214eea5d3d503e3ee8188e420cdfb43f11025bef
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service (ttraff.ru) which is flagged as malicious. This redirector is presented as a movie download lure, indicating a phishing or scam attempt. The presence of numerous links to PDF files hosted on Shopify, while some are benign, suggests a link farm used to obscure the malicious redirector. The ML classifier strongly indicates 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.ru/pify?keyword=berberian+sound+studio+movie In PDF document text
    • http://files.mhcs.me/uploads/1/3/0/7/130775652/fonuwidumajovuxa.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/1/0436/8728/0790/files/sapizab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/dabedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/antiphospholipid_antibody_syndrome_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/sap_accounts_payable_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/65474276244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2109/9162/files/66561590543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/38146228581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/kevupifipoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/pagowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/legitimate_interest_analysis_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/mavaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4835/2406/files/piguwubisotezovizekitetev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/getutiwatafimobasurugewow.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
🗂 Part of campaign: mhcs.me 4 samples

Related samples 5

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_off00007bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD6 5188 bytes
SHA-256: bd6203b05079eb118ea17fccb030a430da30a6325dd51c51394d818cdc43b034
font_01_sfnt_off00008d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 10816 bytes
SHA-256: 74e112e4f5daed96f9dad1dadc4af58e8b24a90846a6ad09faf56a6adf065a01

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