Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bc19853152314e…

MALICIOUS

PDF

47.1 KB Created: 2020-08-02 11:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f5902d4d91640f6dfb59290821536e0 SHA-1: 070fe03f825a66092a2e8dec888fe2b99ff7c3a8 SHA-256: a6bc19853152314ef5a56551be015e2a58bca93383d5e02ad3ce10b1d924c32b
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though malformed, contains text related to a PDF download, reinforcing the lure. The primary malicious URL is https://ttraff.cc/pify?keyword=on+cooking+5th+edition+pdf, which is likely used to redirect the user to a malicious site.

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=on+cooking+5th+edition+pdf
    • http://files.somersworthmusicboosters.com/uploads/1/3/0/7/130775837/686710.pdf
    • http://files.javakhkservice.com/uploads/1/3/1/6/131607063/sovatevijofaj.pdf
    • http://files.driftlessloop.com/uploads/1/3/1/4/131438899/tuzajugumi.pdf
    • http://files.hfchristianchurch.org/uploads/1/3/1/1/131164100/punajasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/28527208125.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/8374326825.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/96265091805.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/4824458062.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/39823905084.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/76953301725.pdf
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/gunexixesiwitovafom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/31708741627.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/36431173849.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/74591313584.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/xexifuvegexunixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/80595862535.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/20992207046.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_off000079f1.bin
2e7f9cb21be8176ba9c25c1a5d44344afff0b3a3c2d1210b8bb549b219224269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 5116 bytes
font_01_sfnt_off00008b67.bin
657342f3b3d39d18f9400e389cd75b3058bf011ba545ea3dd04bdd0bea0e85cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 10608 bytes

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