Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1037ac5f59223e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 20:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfa74040f687b5350752bfb48dcea860 SHA-1: 9a9a080f1f91bb16f3b2ce0ccd32a2087858fa1f SHA-256: bf1037ac5f59223e7d8a8ede170070f40c3d1d0ad5eef58d6487e58a9ef3116a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links points to a known malicious redirector. The document body contains garbled text but also includes the URL 'https://ttraff.cc/wix?keyword=yang+terdalam+cover+gitar', which is flagged as malicious. 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.cc/wix?keyword=yang+terdalam+cover+gitar
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/rolawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/pijanomagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/how_to_change_discord_server_picture.pdf
    • https://cdn.shopify.com/s/files/1/0457/8974/1222/files/nabogedofilefiregib.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/74520508883.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4647/files/beginners_guide_to_transcendental_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/637718076.pdf
    • https://static.usrfiles.com/ugd/756799_ccfb5c068db44b179e1006e16fd6ccd5.pdf
    • https://static.usrfiles.com/ugd/96768c_667abf4259034a88a57572928faef06a.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b21ff665ae4c409e69a998991bc73a.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/57621347026.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/50427008557.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/canevas_de_projet_agricole.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/valitawowinoliwokigiriga.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/collin_county_sheriff_reports.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c08.bin
89e4297c0f9a881bbd5d754661674815d049141f9737413f56b0957e3d54ccbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C08 4892 bytes
font_01_sfnt_off00005c88.bin
04f53ff4e6ffc7257ddf801ac514879a539421f41eee5a7e821efc34ac4d0322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 13792 bytes
font_02_sfnt_off000087c3.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 16344 bytes
font_03_sfnt_off00009d3c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3C 4324 bytes

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