Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a864b69b4a98df…

MALICIOUS

PDF

69.6 KB Created: 2020-08-02 14:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828c7d2f35e1485f3b6b4f48c5eddb33 SHA-1: 72ccd1d46f91a69d7302e742d8f6a972803cb001 SHA-256: e3a864b69b4a98df6c60d124cb80b70385c3f1b8749810d50d75adfdd7a876f0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=arch+linux+pdf+editor'. This URL is presented within the document body, disguised as a search result for an 'arch linux pdf editor'. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broad distribution or SEO poisoning tactic. No scripts were extracted from this sample.

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=arch+linux+pdf+editor
    • http://files.straightjoe.com/uploads/1/3/1/4/131453869/94f3fd8f3.pdf
    • http://files.morethanjustsociety.com/uploads/1/3/2/8/132816036/03f286483812e.pdf
    • http://files.ragsdale-music.com/uploads/1/3/0/7/130740049/3cee10344de4c7.pdf
    • http://files.meowlinda.ca/uploads/1/3/1/3/131379409/114bc8bed09.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/15691852462.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/vepudosiguxonelawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/dadofubazeriko.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/imgur_nsfw_clickable_you_re_welcome.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/clicker_heroes_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/56000106546.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/19654125442.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/33066709415.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/99411715460.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/95262500566.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/77986037812.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/betelamazemofuwaxelewa.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_off0000d4dd.bin
53e43b6f865bd1a483f1c5b018701fa28006981e2d2af01d795b3c14f575c1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 4912 bytes
font_01_sfnt_off0000e596.bin
8d105ad2d1951fcef3dded396584ad34db391674a6df4f6920fcbaf9b8dbea12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 10404 bytes

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