Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abeae456179f16a…

MALICIOUS

PDF

38.9 KB Created: 2020-08-17 00:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be5dfb1e596c044edf60e39b72bc71a7 SHA-1: 375b457672f271bfb52162665a64fdb4277df01a SHA-256: 1abeae456179f16aa2d0e0a4e58a7006fca84aa7a6a367b7968096cb5386f58c
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to exploit users by directing them to malicious infrastructure under the guise of providing sheet music.

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.ru/pify?keyword=charms+abel+korzeniowski+sheet+music
    • http://files.huntsvillemilitaryband.com/uploads/1/3/1/4/131437477/mufewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/64286250382.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/ffxiv_leatherworker_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/nodakel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7710/6838/files/33847853201.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/30733440037.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/98524098218.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/ezreal_mid_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/diagnosis_of_acute_coronary_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/morotosewoj.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_off00004866.bin
0aed495a8a8a9a063bde5b13f2e2360eb1edebc4d0698ee993076b3a868e5f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4866 5624 bytes
font_01_sfnt_off00005bc4.bin
4f4bb246342e62e1441691dd0d6960624d7859bc6a7acb1d2b26406728ebecc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 5292 bytes
font_02_sfnt_off00006db7.bin
301622e0397ef93f8637914a32ffed7789dd436000585d84232f2e877d9e9c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 9636 bytes

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