Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b24c7dfd304e02…

MALICIOUS

PDF

44.2 KB Created: 2020-08-13 13:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5dfd85f1d29c6b24232d6759fbdc8a6 SHA-1: c0a07a01b18e8e7ad6c4607b4a9582106fb787e4 SHA-256: 06b24c7dfd304e0269b66838a2bda715a9d2e30d55e9d06e578e6f80d5b12b42
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link redirects through ttraff.com, a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and appears to contain the same redirecting URL, indicating the primary purpose is to drive traffic 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.com/wb?keyword=cours%20sur%20les%20nombres%20complexes%20terminale%20s%20pdf
    • http://musovut.skeshmm.com/uploads/1/3/1/4/131453540/38156fc97ac.pdf
    • http://files.woodenhenk.com/uploads/1/3/2/7/132741352/retifosaxega-vitebelivume-ziwezoraju-zisareteda.pdf
    • http://files.lakesideassembly.net/uploads/1/3/2/6/132695492/4769832.pdf
    • http://files.sarahhawkyard.com/uploads/1/3/2/3/132303373/4d59a8.pdf
    • http://biviwutet.imural.ca/uploads/1/3/1/3/131380505/tafoxarixo_rekuxevamas_pusavovud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/pijesotezonafawanaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/nekotoxesurawazoxugifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8953/4869/files/89732076722.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rijakilijupefiwopoxafeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/dixeturep.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/sososuxavisup.pdf
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/blunt_trauma_abdominal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4615/files/13374481494.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/xilejubokepuwurile.pdf
    • https://cdn.shopify.com/s/files/1/0450/0422/6724/files/wapufow.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/4132001566.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/vimorifawasikal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/gugijogenogupafiz.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_off00006937.bin
789a04b85add484ab193a8184d0cb1f1dcf4c25056ba2d60542805bba829cb7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 5416 bytes
font_01_sfnt_off00007b83.bin
24976b25cf98c0894a4a7b6c103a7ff1657619a412f1a58329efacbb57261024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 12092 bytes

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