Malicious PDF — malware analysis report

Static analysis result for SHA-256 0367a0e11e8fa50e…

MALICIOUS

PDF

58.2 KB Created: 2020-08-25 00:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45bdb082a397d076ab352dbb32480db SHA-1: d8286e671113f9b0e475cffbed650ed5e6972195 SHA-256: 0367a0e11e8fa50e2f980fd0281efb9849402badaa7325a05e7654935ce284c5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to movie songs. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=narasimha+naidu+cinema+songs++naa+songs
    • http://betowane.radiusannex.com/uploads/1/3/0/7/130776485/gerekatino.pdf
    • http://zuseru.heartoftucsonart.org/uploads/1/3/0/7/130739344/e781fddac9.pdf
    • http:///\/www.sharelyrics4u.com\/2012\/07\/ko-ko-komali-song-lyrics-from-
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/wuseweropu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/6595466037.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/jukofodewofagexuvafomebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/jifekamimuvonevorudoxik.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/4._3_practice_congruent_triangles_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/zileli.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/20280444300.pdf
    • https://cdn.shopify.com/s/files/1/0437/1709/9685/files/learning_spanish_worksheets_for_adults.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000896c.bin
3d0bf7b8bb44c21c77ac634a29706a66c67e3234f9fc959b26be8ffca1324eea
pdf-font-stream PDF embedded font (sfnt) at offset 0x896C 5292 bytes
font_01_sfnt_off00009b38.bin
9c6195197e4b2897e7f8a3a8d407539ab3423799c0b3065530ee68c9352b1edf
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B38 13744 bytes
font_02_sfnt_off0000c6c4.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C4 16164 bytes