Malicious PDF — malware analysis report

Static analysis result for SHA-256 8377a7fd07e49beb…

MALICIOUS

PDF

56.9 KB Created: 2020-08-30 02:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ec7bbfac5f0ea0c884199a5c3be0a3 SHA-1: 6d60d924a29dfd7ad1f0f4e1cdf822e6c71097e7 SHA-256: 8377a7fd07e49bebbcc5236f806ce0596fcdde72059d5136171e713c5500fa7e
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=what+does+aku+aku+say'. Additionally, another critical heuristic indicates a PDF link farm, suggesting a coordinated effort to distribute malicious content. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted from this sample.

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=what+does+aku+aku+say
    • https://static.usrfiles.com/ugd/b8c837_90469ef81c544b36abbc2934d9dec548.pdf
    • https://static.usrfiles.com/ugd/6846fe_85d941f47bfc4b9bbf44ab1eb585415d.pdf
    • https://static.usrfiles.com/ugd/40512e_ba934a5cfb884c6089f866c23998deec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1285a1d03aaa434186f99d8ee747aa87.pdf
    • https://static.usrfiles.com/ugd/c0b427_2679cf241cd14ea5a97585380062c688.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/kindle_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/english_dictionary_english_to_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/banshee_sailboat_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/petevekurusosesunanoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/programmer_calculator_android.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_off000090e0.bin
fab6023968ed8045fa2e4b44d9cadd6844ad85226537ba452abeb7931edd69d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E0 4692 bytes
font_01_sfnt_off0000a0f1.bin
a34c4d3aefa892da0a5a94a88642fa7561f466f741df6a38100c062e4c1aec55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F1 11688 bytes
font_02_sfnt_off0000c740.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 4324 bytes

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