Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7769efeaba7c9d0…

MALICIOUS

PDF

71.2 KB Created: 2020-08-02 04:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b82e888028d14e02340b313ab39d24 SHA-1: 9624d5507ac3d27cb9140587f43bd29423253726 SHA-256: c7769efeaba7c9d08cc874da7778d2a5bac5ac93e4fbcf03850cd7efb370b7b0
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=jasco+remote+codes', is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=jasco+remote+codes
    • http://files.george-ohagan.com/uploads/1/3/1/4/131452922/tuvanirutava.pdf
    • http://files.poetic-healing.com/uploads/1/3/2/7/132740249/kezusasusavu.pdf
    • http://files.pointfiveceilidh.com/uploads/1/3/1/4/131408256/0fd0afff061.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/70438156110.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/tebovixovel.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/flight_attendant_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/28580750207.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/xerizopaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/lipakus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/79152407765.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/zovusol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/plant_traits_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/65404753001.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/lelilezenazevar.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/kusuruzowalawolalewe.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_off0000cbcb.bin
b77c1cad88c8a07d99acad7ecfeb7bc41a88e5d1437ef06eb5185dccd48af1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 5044 bytes
font_01_sfnt_off0000dcda.bin
753947eb9b85d67927754fc006ba66c61a6ad31f75031cf8b78b316d1920fab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 16720 bytes

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