Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fce5060918d9af…

MALICIOUS

PDF

40.4 KB Created: 2020-09-04 23:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06fc27116673c33281756a7d844665f5 SHA-1: c0bc2c20ec44ac9c197f91db9aff7fbaae832a19 SHA-256: 27fce5060918d9af00bcea63bd8874ade896bc8226af12f630c25398c80d2c4a
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 'https://ttraff.club/wix?keyword=dna+test+health+ancestry+information'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Dna test health ancestry information' and the malicious URL, reinforcing the lure.

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.club/wix?keyword=dna+test+health+ancestry+information
    • https://cdn.shopify.com/s/files/1/0431/1338/2044/files/maths_textbook_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/gajujupiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6755/3430/files/application_of_amplitude_shift_keying.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/99846215449.pdf
    • https://static.usrfiles.com/ugd/4c76bf_e50226c60781415f934bebc56a538a94.pdf
    • https://static.usrfiles.com/ugd/0cd019_5752e03a113443a7a29f8266ffbd53e6.pdf
    • https://static.usrfiles.com/ugd/0c41e7_3e894903feff4cab8b3d720d616abf7c.pdf
    • https://cdn.shopify.com/s/files/1/0450/8984/9509/files/inter_1st_year_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/principles_of_psychology_breedlove_e.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/jasivomirawulebeza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/salobofepumadifevokiwotil.pdf
    • https://cdn.shopify.com/s/files/1/0448/3714/2689/files/amsden_formation_wyoming.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/45303805572.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7225/files/csr_bluetooth_4._0.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_off00005ebb.bin
ad8d8da9830635b2606d0ffb491d91de2f893f0cb6e74537fc4624e56d8e7a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 5220 bytes
font_01_sfnt_off00007064.bin
21da873336db0a8275a82cb781f3a0abe0d8fa9775577789699bc5bc57ddc480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 10608 bytes

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