Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd40ac08e2b6008…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 07:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4239a25cba0102c21b76416243f099d6 SHA-1: 28105de3a6e48a838a5fadf01f43be79919ee57f SHA-256: 0dd40ac08e2b60080d467b506dfd37942d6526816672742792f991b9d5d702ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One of the primary links directs to a known malicious redirector, indicating a phishing or malware distribution attempt. 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=video+de+reggaeton+2015
    • http://files.gmitletterfrackresourcecentre.com/uploads/1/3/1/6/131637211/1293978.pdf
    • http://files.bronxvilleteachers.org/uploads/1/3/2/6/132681294/5470674.pdf
    • http://files.mariebrookephotography.com/uploads/1/3/1/3/131382590/domojiperajeso.pdf
    • http://files.jordanslavish.com/uploads/1/3/1/3/131398406/0abdf.pdf
    • http://files.christinepetersen.com/uploads/1/3/2/7/132710797/84da1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/83654494868.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/tukuligidaxixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/35926840084.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/tusijutodon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/kugipolenaduma.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/sexetedibuzesotafitoduv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/card_stacking_propaganda_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/toduvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/wadabugagovulunoduxer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/lojupevudogij.pdf
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/justin_baldwin_hills.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/21841688489.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_off0000633c.bin
26afe28674fb41ecce7140d90966e745926e7d5be133b50326a68f1fe2d66dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5200 bytes
font_01_sfnt_off00007501.bin
6505805cf3dc7a95b2e17d5b06d6dff61f6b501a7760958dc6897e692063a8b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7501 10104 bytes