Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ce4ee80029448f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-14 10:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2a21f3846ba88d5574d179b22cbc36e SHA-1: eae89802dbe6c260aef89f0a62de4512cae79d6b SHA-256: 32ce4ee80029448f14ddd2ca216fd49ff82d6aac8b2cb5c66a5550bd25cebeef
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on Shopify, indicating a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=a.+n.+c.+full+form', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the embedded URLs suggest a distribution or redirection mechanism.

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=a.+n.+c.+full+form
    • http://files.odera.net/uploads/1/3/1/4/131454190/851b0387.pdf
    • http://files.widlundbrothers.com/uploads/1/3/0/7/130775760/b5ca2ccfd1b75.pdf
    • http://wawupixo.modernvoguephotography.com/uploads/1/3/1/8/131858661/tojifilonoze.pdf
    • http://files.lifeteaa.com/uploads/1/3/2/6/132695347/ninewufila.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7682/files/tekubugezirevubilojavavo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/nolonib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/bebatikoreboboxuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/spatial_join_postgres_points_polygons.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3640/files/all_american_girl_meg_cabot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/64521792500.pdf
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/clinical_embryology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/wonuliludutelugoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/terawosafuvodozejep.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/16542768300.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/voyage_en_autistan.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_off00007607.bin
fd0b4c8efa72640a0b54214b7e89e8585c85c94e6c6345e0c9ca837d5055a23d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 4660 bytes
font_01_sfnt_off000085c3.bin
140470036d1698e14fad8d95012a5d9e6de74679a8fbb1fe9383fcd9d031ff10
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 12212 bytes