Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ba36f78bbe2732…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 08:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03085d513a3681463cd21c9030702b88 SHA-1: c20141d7a07e5e4acd065e5a8f3f9cbdace8007c SHA-256: c8ba36f78bbe273286937a4e5c65f6c92d619a8215626c1ba642315c22fb8ff3
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, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to 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.cc/wix?keyword=aoac+official+methods+of+analysis+fr
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/27810241076.pdf
    • https://cdn.shopify.com/s/files/1/0460/1482/4607/files/75677801323.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/94426227923.pdf
    • https://cdn.shopify.com/s/files/1/0438/4151/9776/files/betrayal_at_house_on_the_hill_widow_s_walk_haunts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/janidafemojufut.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3800/files/brain_workshop_net.pdf
    • https://static.usrfiles.com/ugd/e3c460_cb9a8d4a8edd4432ba117d05329147ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e48e6ace5ee48cfb4859bc2255ecf25.pdf
    • https://static.usrfiles.com/ugd/3649d2_06822d7cf78f4a61ae37e9af99ee7e1a.pdf
    • https://static.usrfiles.com/ugd/c0fca2_c612897a3dbf41b6a5ee5f41ecea6ccc.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/zadedizutexewapuxas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/57282297096.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/veterinary_microbiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/duck_egg_blue_bed_sheets.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_off0000570e.bin
5bf039045fe8ec3e1db5327b7316646c6aba73167e6325503c7c9706ce7abb10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570E 5352 bytes
font_01_sfnt_off0000691f.bin
3c4d019762b2a6c5f38d33e78bff319d3b34fb6a4f7bb956a7b69093f6a603b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691F 10508 bytes
font_02_sfnt_off00008d2e.bin
68eef4b610644b6a98f668349b58b424e8310755c20c018328a8321db0e17a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2E 16232 bytes

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