Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d38c3432383ea14…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 14:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5df70eeb0a0bcc34f15ef6efb81a9bf3 SHA-1: 4b1dbbbefe295c80387a4577b7dc74a270527f91 SHA-256: 5d38c3432383ea1403c818159ee580f1296251185da9e16233209ab0e67d2869
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirection tactic to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the malicious redirector indicates an attempt to lure users to harmful content.

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.com/pify?keyword=roland+barthes+semiotics+pdf
    • http://kezijoti.aaugymnasticsnationals.com/uploads/1/3/1/0/131070493/tekapamezase-xaletowiwukaxaw-xotitukal.pdf
    • http://files.norwegianmade.com/uploads/1/3/1/3/131398380/2554e3016c57.pdf
    • http://rimerasox.npsfl.org/uploads/1/3/2/6/132681352/8938607.pdf
    • http://files.musiclabminneapolis.com/uploads/1/3/1/6/131606392/wizamopubuwavisapabe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/fifitatipebaliw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/nick_anderson_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/bidinigorezun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/rajowuxomurifawakiremar.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/bozazuzetejovotuxokag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/wapinasovapolojapirixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/52306594900.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/64247376157.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_off000062e7.bin
a8074e03fcce9eef707578585b4c9a2b8b1d0e78fc7789db75298c6da5f30119
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 5540 bytes
font_01_sfnt_off00007591.bin
3a3e2833968858e0f5e0b84ebfc81bdd0fc919bf8b78b236ab2b261447b3c458
pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10036 bytes