Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef3df78ea72a917…

MALICIOUS

PDF

50.5 KB Created: 2020-08-24 08:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e66af2fbe198cb1d5330035d413636b4 SHA-1: 493fe2b53b6e7de915df2ab7b2c83abf3f54ea0d SHA-256: eef3df78ea72a917d4259c9514aa01ea0c38d61fe321b75887bd0454cf2fd396
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though partially corrupted, includes the same URL and a seemingly academic title, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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=quantitative+research+about+tardiness+of+students+pdf In PDF document text
    • http://files.shyradesouza.com/uploads/1/3/2/7/132740670/pijirumuzutugo.pdfIn PDF document text
    • http://toronos.jaspercountycommunityservices.com/uploads/1/3/1/3/131381679/f69f09d1b.pdfIn PDF document text
    • http://gariganij.antoinetteducheinlagrone.com/uploads/1/3/0/7/130775388/8417901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1882/9206/files/kobuvumusafireliwetumafas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/54816117789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/44825663611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/64673708042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/vunewosanotakogivaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/69875203488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/bepopasuxidude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5403/1270/files/85837461887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/87288386997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/reflected_in_you_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/phoenix_chat_lines.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB5 5352 bytes
SHA-256: bc67fdddb115990de5983615c6f243e26dd1f4d3cd12c8dc2a5fb1bbba17f91d
font_01_sfnt_off00008cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 9904 bytes
SHA-256: 2815f7d4c167afc3f15adf91b47f6b1405d41caae0c17de013e90a4b1a51f165
font_02_sfnt_off0000aeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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