Malicious PDF — malware analysis report

Static analysis result for SHA-256 563ac1049abcb458…

MALICIOUS

PDF

38.9 KB Created: 2020-07-31 21:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abce84cb523a003ad91cd45743370c91 SHA-1: bcb6f60436637ad79d60a4c60af191c67c756a42 SHA-256: 563ac1049abcb458ef086db46782fb7df598f46e84f1a75da31e64d6cc17ea37
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a book title and the malicious URL, suggesting a lure for users to download potentially malicious content. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or distribution mechanism. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

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=stahl%2527+s+essential+psychopharmacology+6th+edition+pdf
    • http://files.sgglassgallery.com/uploads/1/3/1/4/131407818/1d330a4e447.pdf
    • http://files.bvswband.org/uploads/1/3/1/8/131856288/gasekasu.pdf
    • http://files.hatsbyelvee.com/uploads/1/3/1/3/131382590/4835718.pdf
    • http://files.paraglidinginjapan.com/uploads/1/3/1/4/131452799/2096101.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/nuxozofujujariwejibosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/raxagodis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/15155657615.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/fekeri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/19274009337.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/vebekatan.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/30210922660.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/84841126629.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/27024938352.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/54038304976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/46904513353.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_off000057c5.bin
12631cc46aff6bc9574f7a6572356e63521e89ed019b1c66c64d699ea1d17588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 5964 bytes
font_01_sfnt_off00006bf7.bin
a92e1779699d1071c17a04c223b21e8d05b7094df09c9904974da949dc3a3567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 10120 bytes

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