Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf325548e573419…

MALICIOUS

PDF

44.4 KB Created: 2020-08-05 05:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc9f5c094e2b77ae81933ee28f08e8c1 SHA-1: 611039a240b75ea855684fe13ed85041fb9811a2 SHA-256: 0cf325548e5734192c5dd1f6d74c5be2c297bd3a947bb00e3ae7652ac759ef96
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains a URL that mirrors the redirector's query parameter, suggesting a lure related to 'class 10 science chapter 11 notes pdf'. The presence of numerous other PDF links, many hosted on potentially compromised or disposable domains, further indicates a link farm or SEO poisoning tactic to distribute 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=class+10+science+chapter+11+notes+pdf
    • http://files.pinkatz.net/uploads/1/3/1/3/131398094/4652969.pdf
    • http://files.decadentaffairsco.com/uploads/1/3/1/4/131407492/20853.pdf
    • http://files.momentsintheword.com/uploads/1/3/1/6/131607310/5769930.pdf
    • http://files.tmbdesignart.com/uploads/1/3/0/8/130815277/nabaguw_febizuxakirak_razodiraki.pdf
    • http://files.winghamprc.org/uploads/1/3/1/4/131437619/325252.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/zewovudibimijumusol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/english_vocabulary_with_definition.pdf
    • https://cdn.shopify.com/s/files/1/0439/4395/2539/files/76695043102.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/91289791694.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/8_minute_rule_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/6835020902.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/sunudufiweked.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/39851599923.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/71848447109.pdf
    • https://cdn.shopify.com/s/files/1/0434/1710/8642/files/meralgia_paresthetica_physio_exercises.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ffa.bin
6d116c3f9c137b1c3c39f2e776fc0d8816c4b6dfb7a9218fb48bbec6bc976e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 5344 bytes
font_01_sfnt_off0000821d.bin
56ce3b49f254df0f68bc9bcfa738bac260cd6b3a8e2b7509d204bddc7c3c83e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 10012 bytes

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