Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bd5fdbd84a51f0…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 09:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db76fb88baa2fc8677b5b35f6df218c SHA-1: e4a39080e15db3246eb24e8d71cb328754aa32d1 SHA-256: e3bd5fdbd84a51f035e605742d06b807b7580edf26bf32782ac84ddc299b7e56
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, a common technique for SEO poisoning or distributing malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=assonance+and+alliteration+are+different+types+of', is identified as a malicious redirector. The document body itself is heavily obfuscated and contains the same text as the malicious URL, suggesting it's part of a lure. No scripts were extracted, but the link farm and redirector strongly indicate a malicious intent to redirect users to harmful sites.

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=assonance+and+alliteration+are+different+types+of
    • http://files.tiffanyshocklee.com/uploads/1/3/0/7/130775109/6920fa5.pdf
    • http://files.clearviewresort.com/uploads/1/3/2/6/132681150/kafutolenopibevu.pdf
    • http://files.oceansideteachers.org/uploads/1/3/1/3/131383764/8383606.pdf
    • http://files.oneburgh.com/uploads/1/3/1/6/131606642/8329858.pdf
    • http://files.thatoneplaceintown.com/uploads/1/3/0/8/130814492/6963699.pdf
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/28213890370.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/33035909236.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0262/files/dofej.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/51248865478.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/bufimabaxumaberi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/ladawuxodowazowev.pdf
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/kibusizevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7005/files/35819742550.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/68054658604.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/59365091296.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/61463388916.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_off000064bb.bin
122c9626b4d357f0e21cd08d59df097756ed689dad4304daaa7fc1d332653e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 5240 bytes
font_01_sfnt_off000076ab.bin
44592a5728c5b3321318db03fb1dc02961231a0995a6739fd80db41263049e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 10088 bytes

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