Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d9ba198e60b6ab…

MALICIOUS

PDF

51.7 KB Created: 2020-08-11 13:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad0749796c1351d582d8e0beb917eab7 SHA-1: eeb3ace86062070fecada888bec21ef5873902ae SHA-256: 82d9ba198e60b6ab4216b08a3e5da06ac78fa7fca829aad06161539f34ecdfb2
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, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to a '2015 subaru brz owner's manual pdf' and the malicious URL itself. This suggests a lure to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=2015%20subaru%20brz%20owner
    • http://files.wildtales.blog/uploads/1/3/1/6/131606953/miliga_momekodul.pdf
    • http://files.sterlingblackevents.com/uploads/1/3/1/4/131438539/5764711.pdf
    • http://files.canbuildimmigration.com/uploads/1/3/0/7/130739143/7e7d26133eed67e.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/12811645696.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/gitotapafil.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/luigi_arditi_il_bacio.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/93379151928.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/rokevakub.pdf
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/10328066458.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/73048249869.pdf
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/form_action_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/21103797808.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/npm_copy_files.pdf
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/rogikaduwulofunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/92048030739.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/driver_agent_plus_free_product_key.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_off00007e5f.bin
2ef6ba4b087bda46b9cb38eb8fe96e15f51a6ce2310b1331acbd0c62538229b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 5856 bytes
font_01_sfnt_off0000924b.bin
6676fbf421b5b0c995fbcb3f81ce8f44484da8e445ef2b14040b52466a89373e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 15424 bytes

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