Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8a07ceeec69159…

MALICIOUS

PDF

47.6 KB Created: 2020-07-14 03:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d6e442ed836b3941868882bc7ca11a SHA-1: 28afa7a2b2d783964466843b8a8ff2de12d40676 SHA-256: 0c8a07ceeec6915957df8676a9c55380dde10ac42557a91521e07d6758557981
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to WordPress sites hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.cc', which is likely used to distribute further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=introduction%20to%20software%20engineering%20ronald%20j%20leach%20pdf
    • http://files.funthoughtsonlife.com/uploads/1/3/1/3/131398583/xokunog_zajodesugato.pdf
    • http://files.samhoughtonchallenge.co.uk/uploads/1/3/1/6/131606073/kejelubamolo.pdf
    • http://files.thecircleofspirit.com/uploads/1/3/2/6/132680915/bd655f88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vugazevilu.files.wordpress.com/2020/07/31521392636.pdf
    • https://rovuxab.files.wordpress.com/2020/07/98342687277.pdf
    • https://gapojojape420216599.files.wordpress.com/2020/07/mixuxuwusufulujezewosiv.pdf
    • https://nigoruzi.files.wordpress.com/2020/06/deziwokepol.pdf
    • https://jorogoko.files.wordpress.com/2020/07/pidulot.pdf
    • https://zubijunemovo.files.wordpress.com/2020/06/goguvu.pdf
    • https://xaridozav.files.wordpress.com/2020/07/jexazipegojebusofikononov.pdf
    • https://juderoxer.files.wordpress.com/2020/06/93742429374.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/80035645790.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/zawulebineguvuxusesiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/dulawewodixewukeriz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/xefitisanujat.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5718/files/naxegegedosobudonisizezak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/nonumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/gumex.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_off00007a8d.bin
82a801c9b348f7779b387bf33992d687df9648a3a5014e1b4dcb429a01bf96aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 5404 bytes
font_01_sfnt_off00008cf9.bin
e102a898e008170f145d8d370791b161ac4f5de364efc132fc1941aa3edbbd7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF9 10392 bytes

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