Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ac2f02c507f16d…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 05:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 433fbb74fe75337d6b8cd1e22f1d64cd SHA-1: 17e3163708863d1553417542c014664f23c4f22f SHA-256: 25ac2f02c507f16dd520fc84d1390a8b58b6fbfbeb9de3862e433ba5193e668f
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Ssc steno syllabus 2020 pdf', suggesting a lure to disguise the malicious intent. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to a further stage of the attack. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute 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=ssc+steno+syllabus+2020+pdf In PDF document text
    • http://files.kootenaicommunitycentre.org/uploads/1/3/2/6/132681824/1043473.pdfIn PDF document text
    • http://files.fortunatierra.com/uploads/1/3/0/7/130776673/6966068.pdfIn PDF document text
    • http://files.missnorthwestpageant.com/uploads/1/3/0/7/130739202/e5177e80369.pdfIn PDF document text
    • http://files.yogadancelife.com/uploads/1/3/1/4/131406744/vekewuvopomij_jejirutiw.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/1/0429/3135/5807/files/tugajapiwiliwaxurobotigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/73534112031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tosinumemelijigejidab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/28158218814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8358/5953/files/322559829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/zasimorapudomofod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/34502976047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/tinif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/66791750126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/ronox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/88430686540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/79688717279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/28051875081.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 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_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 5504 bytes
SHA-256: a01bf215f523e76bc5745d57320ba7896e6f2f708cddc05ae4c4ed3413fa8f21
font_01_sfnt_off00008154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 9816 bytes
SHA-256: b5b59d483eb9384c00c55d33494637858dfd1b47d40eb70241a9fa815f77663a

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