Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c09b7c9e0724499…

MALICIOUS

PDF

46.2 KB Created: 2020-07-28 17:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38e5ca6995811ddf466ac1ef561be8a5 SHA-1: 0ddcc9dffe14bc96029c46c34eb21f532861cc3c SHA-256: 2c09b7c9e0724499af046de9056a30255ceed4bae3692d53eee30ecdd200bfbf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious redirector at 'ttraff.cc'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Capitalisme désir et servitude pdf'. The primary attack pattern involves redirecting users to malicious infrastructure.

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=capitalisme+d%25C3%25A9sir+et+servitude+pdf
    • http://files.littleempirepodcasts.com/uploads/1/3/0/7/130739688/2721429.pdf
    • http://files.marielmolino.com/uploads/1/3/1/3/131381640/jifipisibiw-parudalari-vaworumulemes-sutukubitu.pdf
    • http://files.jlwarfieldministries.com/uploads/1/3/1/8/131871786/nuriratis.pdf
    • http://files.littleempirepodcasts.com/upload
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/kesojuxilewe.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/xumobuporewujujekogerokev.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/naxagobad.pdf
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/46525787076.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/tijokerul.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/vigizemazuzaneliwaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/lujixena.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/13429423741.pdf
    • https://cdn.shopify.com/s/files/1/0436/9108/1882/files/depizezafikujugop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/3969965204.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/89372069268.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/majawezodatadesot.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_off00007236.bin
4f3209870812ec1ae95505e76ee71f98a02d62405a2933325e19cad85ff56fe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7236 5076 bytes
font_01_sfnt_off0000833c.bin
89e2f3e9c60c3dd8f460dbdb55477ab05016c9d3f45713248d98fbfb9f6131f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 12236 bytes