Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcee7562c802f6c…

MALICIOUS

PDF

105.6 KB Created: 2020-08-24 00:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bcdcd002f6d3d8e64d8fb0ba8b635b3 SHA-1: a6f572a40e2f327fd9b8b230e1cec03143fc1000 SHA-256: dfcee7562c802f6ca46f3a634a99ba180fa68558313d06970c4a813b65f71bb7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com, which is a known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a large number of embedded links to Shopify domains, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicates 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.com/pify?keyword=academic+anxiety+definition+pdf
    • http://bisenored.theolivegrovecmc.com/uploads/1/3/1/0/131070476/kameditapidiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/afro_cuban_rhythms_for_drumset.pdf
    • https://cdn.shopify.com/s/files/1/0430/8952/6951/files/92058458841.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/visual_agnosias.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/6482271259.pdf
    • https://cdn.shopify.com/s/files/1/0465/5330/1150/files/jukerokuxebis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/73464060873.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/27886337026.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/dell_latitude_e6400_specs.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/6098513312.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/kumomuzomesinafuvalofej.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/tennessee_drivers_license_change_of_address.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_off000161c3.bin
782f306479b1ea37751e71ae9e09d416fcaa9afa9460f2061268b034991986da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161C3 5156 bytes
font_01_sfnt_off00017349.bin
4273fabf9e8871401bdd9c4b1bca41a34b6e7e11b5d5fe107616e7a843a3ab12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17349 11308 bytes

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