Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba51d8c050027ac9…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 14:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b166a0979aeb1fdcae4ea5195fbd3150 SHA-1: 13e1a5a68ad0cba6aa7a48b81263aef977212dfc SHA-256: ba51d8c050027ac94aad1d109e93197e58593a9da4c06483e76b6505f24a0a1c
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and a reference to a 'manual camera sony cyber shot dsc w570', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO spam or link farm techniques used to improve search engine ranking for malicious sites.

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/pify?keyword=manual+camera+sony+cyber+shot+dsc+w570
    • http://files.jemskpropertyventuresinc.com/uploads/1/3/2/7/132741334/29118433447ac09.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://demas.joyriderpromotions.com/uploads/1/3/0/7/130775403/f2dec22f0fa7f.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/95587575628.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/8745258855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/junubetozon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/divumajuzibuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/fubav.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/7212414722.pdf
    • https://cdn.shopify.com/s/files/1/0437/5255/4657/files/roblox_script_executor_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/12669108836.pdf
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/wigibapoxejevoxon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/xovibevon.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/hamlet_monologue.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_off0000626f.bin
3d36be352ed42c797d57930d1a785e396ba836d9f28debab1ad32edb00743f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 5864 bytes
font_01_sfnt_off00007653.bin
d825b49ed50392c62989e868113e25e20f38cf552ed9c3d50e3c1382c5a695ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7653 9852 bytes

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