Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24fb50ce602987c…

MALICIOUS

PDF

46.4 KB Created: 2020-08-09 00:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6472f702f0809a7027ba75a0ff22505 SHA-1: 3784fe45eb71fd4427213120c994a3eaccbb9f86 SHA-256: f24fb50ce602987c0e6b25429e9923f1be1df9e76e410cc1c857f9e1320ab41b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.cc. This indicates a social engineering attempt to drive traffic to malicious sites, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=revised+common+lectionary+year+a+pdf
    • http://files.changingfutures.org.uk/uploads/1/3/1/6/131606087/mufegesitawiko-matuwomap-xivekun-vokozufeletefuz.pdf
    • http://files.dkg-betadelta.org/uploads/1/3/1/0/131070192/legixom.pdf
    • http://files.sportsvisions.com/uploads/1/3/0/8/130814043/fa10325a83d.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/speak_now_3_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/lumitamasafode.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/72694518096.pdf
    • https://cdn.shopify.com/s/files/1/0437/8886/1602/files/75233671732.pdf
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/real_audiencia_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/nuluruw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/wuzixoratunajuninejite.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/mofumutagafeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/tanokarike.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/77566709220.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069aa.bin
3e9ff158d8a6f36aa1a4f63173f22b2a580d163bea37e95ecbd0ca97adfef123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 5468 bytes
font_01_sfnt_off00007c40.bin
6d1ecdf7c24077fadfd5137c99bdaabdc86dfb7580fb88ef203067922301924d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C40 15020 bytes

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