Malicious PDF — malware analysis report

Static analysis result for SHA-256 35765b813cc211e1…

MALICIOUS

PDF

49.1 KB Created: 2020-08-22 04:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26191825c1b733d0dec7736699ca22e SHA-1: 65d2ba55cd8cd1642acd0985a11c6ba35e01b347 SHA-256: 35765b813cc211e1f4157ef9fa7c3e030d306ea9a5c2668c46abfe09702f4531
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains. The ML classifier also flagged this PDF with high confidence. The presence of numerous links suggests a delivery mechanism for malicious content, likely leading to further compromise.

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=lagu+opening+boukenger
    • http://files.canyons-ea.org/uploads/1/3/0/7/130775952/gituwuwefi-bogav-kulig.pdf
    • http://duloj.labcharter-pto.com/uploads/1/3/1/4/131406821/838d70f69030.pdf
    • http://files.thecanningtable.com/uploads/1/3/1/6/131636725/vujoxuboj-lonifiwug.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/video_ad_script_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/fawopalejunevekik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/59396108736.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/rapeloxajerimutatedigun.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/ambulance_care_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/74740974034.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/how_to_make_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/18811456725.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.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_off00006383.bin
749178ada359c1c81f6b5c10f47f36148bdd2bd8036a0e2c884b7b93ad9ac5bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 10096 bytes
font_01_sfnt_off000084e1.bin
5519b9899f1b6d627e5fdb9474a673e6f09c638d74be9067f771adbdf8a58051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 4924 bytes
font_02_sfnt_off000095b3.bin
232bd557c3559cfd2b1eb33a609074475fc40a1135acd5fb439d774085b8538f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B3 9896 bytes

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