Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab7e339a6445a82…

MALICIOUS

PDF

43.8 KB Created: 2020-09-05 13:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd5eb10c8e368fe489a21bbeda168dc SHA-1: 929eab34a3dcd83e1cf9bd79e0e218524bed314e SHA-256: 4ab7e339a6445a82b3b5a6128c41556fdcffc701d8fb93db779c3842d0f91d02
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a PDF related to computer science engineering, directing users to the malicious URL. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=basics+of+computer+science+engineering+pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/46051308921.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/9112647522.pdf
    • https://cdn.shopify.com/s/files/1/0444/3960/1318/files/pasipabef.pdf
    • https://static.usrfiles.com/ugd/735424_3e5539e004054082b374e4de73b081ea.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/chinese_to_english_translator.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/jegod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/correct_sentence_punctuation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/83053636408.pdf
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/11669509494.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/cardano_s_method.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/38810225405.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e23.bin
e0bf81d402343240acd660630f558992f08f6d641960ab14bb3f06d959a825bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 5376 bytes
font_01_sfnt_off00007047.bin
3f90d01731ec246ca6e3f63fe3192b8478ba233a122a08109fda1389094dc7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 10580 bytes
font_02_sfnt_off00009459.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9459 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.