Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b7b187b7fd72b2…

MALICIOUS

PDF

43.5 KB Created: 2020-07-26 13:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41720412cc12a4629609a8a072d94f21 SHA-1: fdfe1fd0da90fe4fe966b694bab2518a2e9cec1b SHA-256: d8b7b187b7fd72b294c1ab9fc1eb6679c5968ee2d9d84bc7c025676da69761a9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'California autopsy reports public record', likely a lure to entice users to click the malicious links. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=california+autopsy+reports+public+record
    • http://files.regencyparkcary.com/uploads/1/3/0/8/130874587/1544936.pdf
    • http://files.streetlynxshop.com/uploads/1/3/1/3/131379353/xojizekunobufewak.pdf
    • http://files.actonhistoricalsociety.org/uploads/1/3/0/8/130813730/4842479.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/75698154259.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/forakolekewamep.pdf
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/katafiguvosuseponuwuval.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/33804208839.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/72327922764.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/83206705111.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/vetanudidivemugidawogom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/84461081950.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/84

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb5.bin
4a1ad2f3b0ee8f3f4e368c2dc205063a842525ee915df173d0355f9195acf52c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 5296 bytes
font_01_sfnt_off00007ec7.bin
cbf171f977072fd5d56517b6b40a665cbd9c1530f5663ac35d17edd571fe757e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 10028 bytes

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