Malicious PDF — malware analysis report

Static analysis result for SHA-256 5216b5521df5b81d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-24 00:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6283d9709a858cc47c6ca4b4d9deb11d SHA-1: fbe5a207e582d88e7d45f9bb136c880b70effd02 SHA-256: 5216b5521df5b81dbe605f91e4de89df6745a857548f37ede345bee5c53799b0
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious URL and several benign-looking Shopify URLs, suggesting an attempt to disguise the malicious intent. The primary malicious URL is likely used to lure the user to a phishing or malware-hosting site.

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=threads+inkjet+printable+fabric+sheets
    • http://rojibaz.danielklittleton.com/uploads/1/3/1/4/131437502/0f411a.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/64314992058.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/example_statement_of_purpose.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/group_bourdon_test_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/zozidomexefedetegabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/pixelmon_razor_claw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/41408716201.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/49478507914.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/17447536145.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/77174673293.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/physics_formulas_for_class_9_and_10.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_off000054ca.bin
44f10494593f46034ed9d4c1a0743a99fb398991b77ffa8db6f42d293d55aaa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CA 5472 bytes
font_01_sfnt_off00006752.bin
3e072908bc9f4486de657bef12873166285c20575f5024bab77d7136209d957d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6752 10296 bytes

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