Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ee351b7d4ef7f4…

MALICIOUS

PDF

106.9 KB Created: 2020-08-02 16:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac52990c48945fa4cf78588b812953a3 SHA-1: 348bd24ac1869bee1985d478f733a840aeec166c SHA-256: f9ee351b7d4ef7f4b8b1b087e8092322b4de769f5f5b58fded9a36be9cc2c481
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=breath+of+the+wild+wizzrobe'. Another critical heuristic identified a PDF link farm, suggesting a spam or SEO-based distribution method. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same lure text as the malicious URL.

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=breath+of+the+wild+wizzrobe
    • http://files.apriloliviaroskos.com/uploads/1/3/0/7/130739895/6041879.pdf
    • http://denuf.mochisu.com/uploads/1/3/0/7/130739625/zezipu_safel_vagozuvavatusar_wigud.pdf
    • http://files.mystartjournal.com/uploads/1/3/1/6/131637136/sepazejituled-gewopi-zazipolajum.pdf
    • http://files.markjmusic.com/uploads/1/3/2/6/132681931/kibisosilirum.pdf
    • http://files.rippleartstudio.com/uploads/1/3/2/6/132695915/17530dcd.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/71025014107.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/master_piece_kannada_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/23646558518.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/20296533192.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/juzopo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/rumabapis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/duluvineba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/zepitikumejukaxowanur.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/24993988439.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9917/files/joworafari.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/71082726597.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/7774689053.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_off0001588b.bin
5710ba136d335cc5edf581eebb2720356bf9a26be25b45f6b58e89cdfe327e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x1588B 5148 bytes
font_01_sfnt_off00016a21.bin
9b1b7859f922e87abf9773f059142b2e19ce5f012b0248906f305782fa5bf6c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A21 16892 bytes