Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfce405c61316db7…

MALICIOUS

PDF

45.9 KB Created: 2020-08-20 20:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2512444c82a10fd7cf6cea9eeb83b14 SHA-1: 83a849dd8cc7974af11bb1318124d777bb7a93a0 SHA-256: bfce405c61316db73cab79f8f778a9e9cc5391e3629cab8258c5a4d899973699
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=linkin+park+castle+of+glass+lyrics'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains similar URLs, reinforcing the conclusion that this PDF is designed to lure users to malicious sites.

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=linkin+park+castle+of+glass+lyrics In PDF document text
    • http://files.suttonhousephoto.com/uploads/1/3/1/3/131384414/689540.pdfIn PDF document text
    • http://rerut.traceyknapp.com/uploads/1/3/0/7/130776132/6182988.pdfIn PDF document text
    • http://files.melodymoonbrooke.com/uploads/1/3/1/4/131437418/wonamimuxijude.pdfIn PDF document text
    • http://files.rsu14teachertech.org/uploads/1/3/1/3/131383837/xarer-raziwesanex.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/1/0431/0938/4345/files/72173457700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/nys_notary_exam_study_guide_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/79957540220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/2_stroke_si_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/guitar_hero_3_cheats_xbox_360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/bootstrap_form_design_w3schools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/1511136624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/bootstrap_button_classes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/85604421218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/92287314173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/1357/8408/files/free_financial_dashboard_excel_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/68477532907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/75969939910.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5292 bytes
SHA-256: 286d120f90bc3acf0cc66395cb8fce8ee958186eb671d0aa7d24784fa84ac9ca
font_01_sfnt_off00008601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8601 11008 bytes
SHA-256: 0c027fd6608a5cc6cf45ca1d46d226ae3582b5239436e0cdcfe82904d6b99b79

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