Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04b1667a5d5e94e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 22:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2910003aad0f5e4e0ebe18154834d46b SHA-1: d897a79c67540747d8dd84b2c04ef46ec185466f SHA-256: f04b1667a5d5e94e8d8d18e30905c990901a1d16f918ffa7988ded3d2a94e7d1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is associated with a lure related to a 'Sims 4 torture mod', suggesting a phishing or malware distribution attempt. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign PDF files hosted on 'static.usrfiles.com' and 'cdn.shopify.com'. No scripts were extracted from this sample. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=sims+4+torture+mod
    • https://static.usrfiles.com/ugd/b8c837_58ad093217334ca2b9ab7adebf70c51e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5abee67d93264a0a8fa8ec8f88a3df11.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd83d7e36df4569834cf49203f6545c.pdf
    • https://static.usrfiles.com/ugd/7f16bd_8a50d5e83b0b4c1fa80af7fc2234f7ae.pdf
    • https://static.usrfiles.com/ugd/0b46e6_6a04b4bab1744cae863121fd98c50795.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ff32f78a12449649dd687e530b692e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7214c10c1b47438db081708e9ff2ce.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/capitec_funeral_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/94366868520.pdf
    • https://cdn.shopify.com/s/files/1/0434/3945/6423/files/65524091003.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/bram_stoker_biography.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/xibunem.pdf
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/10_bornean_datus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/carb_cycling_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/nanajejewafotene.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/xaxavezevuduzibazis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/destiny_2_fast_light_leveling_guide.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_off00006fce.bin
13d21f1e3e3624bfebedaabcd269a0bafa36db407918dbe52dd8918f4bec1d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 4920 bytes
font_01_sfnt_off00008073.bin
cc0a499fc67c930c81bd6f82a1109544ed1b5d75b279dcf1f264f2dd68475808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8073 10404 bytes

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