Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d9b44aecfae0da…

MALICIOUS

PDF

35.4 KB Created: 2020-08-28 08:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35058d80335f99b5fc2345fc70d56a3 SHA-1: eeda944a5a5b37296f81621df1322c77b55286a9 SHA-256: 23d9b44aecfae0da05b7a9aa1173b388fb2838fef23db343fef828f36c9c933d
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identifies a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=god+and+god+allone'. The ML classifier also strongly flagged this PDF as malicious. The presence of many Shopify-hosted PDF links suggests an attempt to obscure the true malicious destination. No scripts were extracted from this sample.

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=god+and+god+allone
    • http://files.monteservicingandrepair.com/uploads/1/3/1/6/131637553/154234ecb.pdf
    • http://jinuwuna.nysacanecorso.com/uploads/1/3/0/9/130969873/0eb25fab2121.pdf
    • http://files.shelbycountychess.com/uploads/1/3/1/6/131606060/zevimi-wefaf-jiwad-sitex.pdf
    • https://cdn.shopify.com/s/files/1/0462/2509/6858/files/fajiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7700/8548/files/budigezap.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/29945791998.pdf
    • https://cdn.shopify.com/s/files/1/0462/5183/5543/files/abdul_salam_chaus_superfast_english.pdf
    • https://cdn.shopify.com/s/files/1/0460/3576/3364/files/43273421739.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/segurizisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/football_game_free_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3902/files/gizixiput.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/europa_universalis_4_modding_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/5th_grade_math_place_value_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/4376/6950/files/duxivuxobabim.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/tikerobetepamokateren.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_off00004d8a.bin
c25b4172929a59f43ff823a721bcdea6e2ad84da99720a7c71c67e8834526988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8A 4752 bytes
font_01_sfnt_off00005dd1.bin
ed177ff179b4e3f3ee716a1a24091fb853b0dece13d8412012b13494d86ca803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 10368 bytes

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