Malicious PDF — malware analysis report

Static analysis result for SHA-256 240fc3aab1f7a976…

MALICIOUS

PDF

43.5 KB Created: 2020-08-25 01:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea8fc8e92ea15158ecb12d4c8fd1ea6 SHA-1: fb77fb577176a82525e312a72aadcf00aecb0784 SHA-256: 240fc3aab1f7a97672264904dd0b78b35a7f144918e4d067e193c5ba2c518064
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users through a seemingly innocuous game reference to a 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.ru/pify?keyword=game+kartu+spider+solitaire+windows+7
    • http://files.mts-wines.com/uploads/1/3/1/0/131070579/9214979.pdf
    • http://files.brandon-ind-deburr.com/uploads/1/3/0/7/130739204/29cca8.pdf
    • http://gopotoma.veggieandlovingit.com/uploads/1/3/1/3/131380042/0f7d38c6032a.pdf
    • https://cdn.shopify.com/s/files/1/0456/9946/5372/files/22789128157.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/zogoxosaruvemujibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/equalization_and_compression_for_voice_over.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/8327973374.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/jntu_b_tech_ece_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0245/files/hifi_corp_south_africa_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/32843034330.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/new_bollywood_songs_audio_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/southern_france_tourist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0464/4903/3384/files/kayak_camping_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/domufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/mebemoradaxedemupiziw.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_off00006b13.bin
168a83a168524f09b994365787e4182d24e9653bfdce5c26ef1583d14ee2ee77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 5372 bytes
font_01_sfnt_off00007d6b.bin
11d39e99ef1f9c442bbf7ec1b045d3eb48db4600b4d07644fb4d2f022a0a1613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 10364 bytes

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