Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7aaf37cc63d335…

MALICIOUS

PDF

49.1 KB Created: 2020-08-22 19:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983013a960157e9265b24564691561ed SHA-1: 0262502176329ac0a0d02dec2834b830d49758f6 SHA-256: bf7aaf37cc63d335cf02762d615bbf96d653d9e17090cf304eae170c63a851c7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to act as a link farm, with the primary malicious intent being to redirect the user to the ttraff.ru domain for further exploitation or phishing.

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/pify?keyword=lego+disney+minifigures+series+1+rarity+guide
    • http://files.equipasia.net/uploads/1/3/0/8/130874352/3328991.pdf
    • http://mekafifal.red-bean-coffee.com/uploads/1/3/0/8/130814526/dotinidavutil_lowigipasozad.pdf
    • http://files.johnnosscience.com/uploads/1/3/0/7/130739227/mojenapisofez-mefine.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/42058439108.pdf
    • https://cdn.shopify.com/s/files/1/0428/7633/8335/files/horde_1-_60_leveling_guide_classic.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/subivex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/83692979344.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/techos_verdes_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/34542343811.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/business_english_b2_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/amazing_grace_jazz_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/37537943917.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/nuxavozak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/10359466521.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/wow_just_a_few_more_things.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_off00006bfc.bin
8b8b289eb9dd7e4bf4b6b6837a936904899472f21baf8a34c0bdf7b1c2c6a38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 5288 bytes
font_01_sfnt_off00007dfa.bin
4d15d9e2cbc2dfc4dec91e5a1050632d66ce40fe757faa2c176e6ea47eb00896
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 10524 bytes
font_02_sfnt_off0000a22f.bin
7348a63ea9206f1dd9d85ac5b8e77a4d6d13d552d707fc8209e912c0db264539
pdf-font-stream PDF embedded font (sfnt) at offset 0xA22F 16076 bytes