Malicious PDF — malware analysis report

Static analysis result for SHA-256 8618847b5204f391…

MALICIOUS

PDF

63.0 KB Created: 2020-08-18 15:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de921fd9bb2392c5dbb51b1c9dd7d9a SHA-1: 5424bc56406946ddb599bcb9454c015e14cff1da SHA-256: 8618847b5204f391586026c57d2252693f5891ae5ac0647a7b548e8823c17917
154 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 host further malicious content or phishing pages. The document's structure and embedded links suggest it is part of a link farm designed to attract traffic, potentially for SEO manipulation or to distribute malware. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=cisco+asa+firepower+threat+defense+datasheet
    • http://files.californiadaylilies.com/uploads/1/3/1/3/131381919/4690694.pdf
    • http://wonebos.yeyeluisahteish.com/uploads/1/3/0/9/130969536/jitibotagetudal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/audio_song_editing_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/dibojinikamalomaguvofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/11196423447.pdf
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/sor_callista_roy_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/tuzefaxofosufotaxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/windows_7_product_key_generator.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/barron_s_regents_exams_and_answers_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/solaxoxibopedigutikip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/90886284645.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/84567643659.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4664/files/nokun.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/assessment_proceedings.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_off0000ab4f.bin
4e277dea6a2faa11718297783ed3e51d8dcc21923f1885a5c5762cc823536dca
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4F 5208 bytes
font_01_sfnt_off0000bd09.bin
8e44701061ea58e31ec7989326501fbb6b17dadc7cf0ce6c04abd8101856607f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD09 16156 bytes