Malicious PDF — malware analysis report

Static analysis result for SHA-256 585554a403c33317…

MALICIOUS

PDF

45.7 KB Created: 2020-08-05 10:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67deef29af2f9b41935f765fdb0c8f57 SHA-1: d73cfac7a182a5952fe54c8936502b0adbd87033 SHA-256: 585554a403c33317115db46f6db71eb901cf91ab4e0e61a0aa0e2fbc4d297026
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references 'summarizing and paraphrasing exercises', suggesting a lure to disguise the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for the malicious content.

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=summarizing+and+paraphrasing+exercises+with+answers+pdf In PDF document text
    • http://files.kaindl-us.com/uploads/1/3/1/4/131438245/df4dd33ce5f22c.pdfIn PDF document text
    • http://files.tamueventing.com/uploads/1/3/1/3/131380005/tijukinupudag.pdfIn PDF document text
    • http://files.jeskare.com/uploads/1/3/2/7/132710715/7572291.pdfIn PDF document text
    • http://files.enderbypreschool.org/uploads/1/3/1/4/131454065/pagaxom_fukunej_kerebevol.pdfIn PDF document text
    • http://files.sarahhauser.com/uploads/1/3/1/3/131383743/a12f3ef965d10a4.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/1/0431/8468/5224/files/15059993755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/95012947821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/botapiwuretugasurelur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/85715526954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/56561228858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/lotatunepapewesikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/nawivasitozajabomotelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5403/1270/files/54908682041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/20166656351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/31287649790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/rebivi.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_off000072d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 5848 bytes
SHA-256: 1bf41ec4d24843c1d70caca5220c5c8af0aa0c43d66dbd280b21a0f973c4114f
font_01_sfnt_off000086b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 10120 bytes
SHA-256: b8c0d0f012f15e59368260aeae04bc38a0b730330e6af303ab71bc5b93eeac44

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