Malicious PDF — malware analysis report

Static analysis result for SHA-256 beff91689434a33b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 17:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffefad7718a87301080f2a378ad60700 SHA-1: 19eebadeeafe480bc8dda32db22227a2f6809ad4 SHA-256: beff91689434a33b2e3cdb8b6dcad6b4441c7d8893f89c5ac6ac526645134ca8
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=destination+a1+grammar+and+vocabulary+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary goal appears to be directing users to malicious infrastructure through these links.

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=destination+a1+grammar+and+vocabulary+pdf
    • http://files.nourishacupuncturewellness.com/uploads/1/3/1/8/131871480/e11ccb0e0c.pdf
    • http://files.kingsfellowship.net/uploads/1/3/1/8/131871467/molokalutarabofewuz.pdf
    • http://files.onehealthyrelationships.com/uploads/1/3/0/9/130969761/68e14a9a70.pdf
    • http://files.theothertheatrecompany.com/uploads/1/3/2/8/132814071/fopuluxasug-mugejobe-guvazigovegif.pdf
    • http://zekuzogul.shanesimaginenation.org/uploads/1/3/1/4/131408738/3e9fb5f9aaa615c.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/bwv_846_score.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/bazuwoterarubere.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/76119530530.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/diromarixajotepapip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/25078636993.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/27721721385.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/nidefedifodimirugowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/generative_adversarial_networks_cookbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/457162215.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_off00006469.bin
f06907f555616d96becd34d79022a7bf81f35377eba016fb9db9cedd2b943811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6469 5828 bytes
font_01_sfnt_off00007840.bin
be2ad08dd568915d7e6003735038b0bb8310d2bc8876dbc18c48cd6357defc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 10304 bytes

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