Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1a3bca6b00258a…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 11:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b322850bcbe76732219ef9ca7e08bb50 SHA-1: a8c93013b853022d1da5b26bb43ad4e32a0e49bd SHA-256: ef1a3bca6b00258aa8ca603601327a6a08d2f2481361bda3650b688ef086c86d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Austin and ally songs musicpleer', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, some of which are hosted on Shopify. The primary malicious URL is used to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=austin+and+ally+songs++musicpleer
    • http://sotoj.sptbc.com/uploads/1/3/1/4/131406798/3029021.pdf
    • http://files.hillsideswimteam.com/uploads/1/3/0/9/130969424/poveki-pebukoveji-zokujojogepu-fodidupit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/56642403629.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/nikilivanobinem.pdf
    • https://cdn.shopify.com/s/files/1/0438/5017/0530/files/risk_of_redundancy_letter_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/calculus_for_the_life_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/sadadurilulasujegozoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/wunibavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4124/9690/files/96904409871.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/31868721199.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/43338073143.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_off00004024.bin
518ded06cb3ba9df4d37baa159cf20dfdd566db498ed33a66035721fba8bdf04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4024 5364 bytes
font_01_sfnt_off00005248.bin
306153a14f6c913f7d0f0ef8bbe613dbef2fbfc335cb8fdd9f7ee6fe37872e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5248 13540 bytes
font_02_sfnt_off00007d68.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D68 4324 bytes

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