Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72eff53611ffddc…

MALICIOUS

PDF

57.5 KB Created: 2020-09-20 19:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 399a433ae8f2f8f44b35937650856465 SHA-1: 4af4077a6c0484ab6e7b86828d43516bfb4828ea SHA-256: c72eff53611ffddc94cbebfe67f4cacfe04261204e82ca36cf85dfd5f97ec527
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, `https://ttraff.link/wix?keyword=mgsv+first+aid+manual+location`, which is likely intended to lead the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=mgsv+first+aid+manual+location
    • http://files.livingwithachoice.com/uploads/1/3/1/6/131606177/ca1a4c46b33ea0f.pdf
    • http://files.palmbaymoose.com/uploads/1/3/1/3/131384135/tavugekujuvewo_nopegegiserere.pdf
    • http://files.lianafaletto.com/uploads/1/3/0/7/130739155/zupaxununa.pdf
    • https://3996fb01-081c-420f-8dd5-11eb4a82fb46.filesusr.com/ugd/097bd5_b6cb5484a3174747824535991c2ede7b.pdf?index=true
    • https://a0e34b63-2f01-44eb-9645-c39457d7b420.filesusr.com/ugd/6da380_e708bf0830454f12a1ab6a1a2ad51cca.pdf?index=true
    • https://54f55cbb-c932-4423-bcf1-0cf1a5057979.filesusr.com/ugd/938c70_64981082d0924e358d246347cef8fbf9.pdf?index=true
    • https://93629046-d8d4-4127-bbdd-de444f179f5b.filesusr.com/ugd/c450b2_7fa22afec48c40cda1bc58c2fed2db40.pdf?index=true
    • https://eafbe6b9-de00-4835-adec-02b624e51baa.filesusr.com/ugd/0b46e6_c36e2e6ebfea4ec294149326c68c1b70.pdf?index=true
    • https://2e17c071-fea9-4991-86e6-c9ed27445f71.filesusr.com/ugd/cdfdba_3f5c3ade6ef243a288c8b0c2281efd26.pdf?index=true
    • https://be63ac85-6271-4632-8f95-123dc554c402.filesusr.com/ugd/4d935e_0676ecba451542fa90aff41983ded0a2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/mojegubuvebusat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/adjectif_qualificatif_pithte.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/jufajebudetanexopiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/basic_html_tags.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/48403108025.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ad.bin
25498ad5e11895af44a379e432d41f2a2c3b61697d89d5ecd92dece6bb9bf47d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 19656 bytes
font_01_sfnt_off0000a22a.bin
f5764146f5e0dd0d53a45663e6bffa5537f5ca7c646741f465b80c268386aaa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA22A 5408 bytes
font_02_sfnt_off0000b492.bin
6c7c10024e2e31b4dfee5b9aa8ec9061ffc855eb6d33499dd4a1859b8ac78236		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB492 10656 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.