Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b346ff41cefa1d…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 18:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 986365f45423da10843a18210ec9e294 SHA-1: ba9ad198e65a27826a603d7901b27c0d9d738f17 SHA-256: 27b346ff41cefa1d5eb928c04d7f8acca69d37099304e63634a217f0d8409b5b
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large farm of external PDF links. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=anchor+bolt+cad+block, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same URLs found in the heuristics, reinforcing the link farm attack pattern.

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=anchor+bolt+cad+block In PDF document text
    • http://kasaxuju.zacharyjblum.com/uploads/1/3/1/0/131070450/sosufekowujepusutusa.pdfIn PDF document text
    • http://nurafilol.pendulumalchemy.com/uploads/1/3/0/7/130775286/tuvoronizex-fofijanosi.pdfIn PDF document text
    • http://files.sbelart.com/uploads/1/3/1/3/131379477/6586071.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/1/0437/0310/7752/files/watexipirukunoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/41._8877_87._6361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/85104300368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8650/3326/files/pabigodewibuwoxetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/aadhar_card_online_update_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/rukebobolubeluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/biblia_ortodoxa_vechiul_testament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/grimm_season_5_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/kowokoselidogegejekivafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/dobig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/importance_of_after_sales_service_to_customers.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_off000054e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E1 5044 bytes
SHA-256: a86c5490ab1cd8dba5bf1797a95908b1384bfcd665251a4623daae220c627de2
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 11092 bytes
SHA-256: 003b06d6711c3e6afce14c25f12f8a690be67f80abe9dc0e8e077b4236162189

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