Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f0ba1f17f8d376…

MALICIOUS

PDF

43.7 KB Created: 2020-07-31 22:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1fea6e91c2c924f9c8c1f3211476716 SHA-1: 3fb296f7d61328d3ff9d508aed8961bddd56bfca SHA-256: a7f0ba1f17f8d376bdb49f8751d535eb7d6dc09d0e13e9089bc205070d8dd7e3
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=san+diego+craigslist, which is likely used to redirect users to malicious content. The document body contains garbled text but also includes the suspicious URL and several benign-looking Shopify URLs, suggesting a lure or redirection mechanism.

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.cc/pify?keyword=san+diego+craigslist
    • http://files.grassyknollfarm.com/uploads/1/3/1/0/131069906/e793257e4f736.pdf
    • http://files.lindsaylibenwellness.com/uploads/1/3/0/8/130814043/pigomifewu.pdf
    • http://files.marineparktransfers.co.uk/uploads/1/3/0/7/130739508/tujisesijilarow.pdf
    • http://files.buildingleadersforsuccess.com/uploads/1/3/2/3/132303235/5f92783.pdf
    • http://files.footsteps4thefuture.org/uploads/1/3/2/7/132710776/6239168.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/77772721456.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/kekebitek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/taresade.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1981/files/wisutixurejizoxunakojutem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/87680775848.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/lopuditanevogikavekewixiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/6473766298.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/rubakido.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/6132449663.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_off00006838.bin
869f6286f1e7bd1c2d8e4de34578ce702aac3cba2bf2e84db1a7bd54efdc52f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6838 5208 bytes
font_01_sfnt_off000079fa.bin
10fc5fbd7a30ca4961f13d366ce09c32d4b749a9c7b4b6a68b78d1726e8210e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 12448 bytes

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