Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe5d6eac7862eee…

MALICIOUS

PDF

35.2 KB Created: 2020-08-30 19:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013f628bf8189ae173f411663e1ba654 SHA-1: 22d294ea5bfb48560e80bde06303f6f0e74d81e9 SHA-256: abe5d6eac7862eee947e63b391d89b26e83775185ff5259d3ed9e767ac37df6c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The document body, though malformed, contains the same lure URL. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the embedded malicious link.

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.cc/wix?keyword=calculus+of+variations+gelfand+pdf
    • https://cdn.shopify.com/s/files/1/0440/5559/3110/files/wimororasavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/bd_natok_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/types_of_nematodes.pdf
    • https://static.usrfiles.com/ugd/45e30f_f115c69181084a7297558ce527558708.pdf
    • https://static.usrfiles.com/ugd/b8c837_9586012e658f4a18b04395e18214053e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b2e0677ffdc434289e2fae52a9c2527.pdf
    • https://static.usrfiles.com/ugd/b8c837_55b2050e17af4d6ca8bd236f28beb499.pdf
    • https://static.usrfiles.com/ugd/b8c837_a85aa1e089fd48a68b3fad5229d7176d.pdf
    • https://cdn.shopify.com/s/files/1/0446/2706/7043/files/list_of_west_african_countries.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/nursery_school_curriculum_in_uganda.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_off00004ad6.bin
973facfc6c5d2aa7d15ce92f0fb025db2da925722159d7953535e3917b21cfc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD6 5288 bytes
font_01_sfnt_off00005ce5.bin
11044040ca98fd60d1d1877a7a57e9680620c2bede3dff464e60bd69374aca53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE5 10504 bytes

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