Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6894fa92e01fff2…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 22:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b50fa65c4b8d9659873f0a02346c9e2 SHA-1: d377a4e0ec1c9b9a78813702fbeafef761ca0bb9 SHA-256: d6894fa92e01fff2157b2cc6c13f7a3f71b8b38c77e41b35b8c28912bb5dca3c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Acer aspire 5250 repair manual pdf', suggesting a lure to disguise the malicious intent. The presence of multiple unknown URLs further supports the malicious nature of this document.

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=acer+aspire+5250+repair+manual+pdf
    • http://zaxuf.findahappybalance.com/uploads/1/3/1/4/131407355/4aab4e6a569ea.pdf
    • http://files.jlmhomeimprovement.net/uploads/1/3/0/7/130775427/tuxev.pdf
    • http://ziwiseme.msa29palms.org/uploads/1/3/0/8/130874038/287276.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/sandhyavandanam_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/49788121619.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/96524329893.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/59210693014.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/93921787486.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/risup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9845/files/dawanenij.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/sapiratoturoguzebedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/5618973389.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000040df.bin
5ae702da59c9aeb2045aebc9c9b22978c4335e67fd72b00b4a2589e35feda91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40DF 5380 bytes
font_01_sfnt_off00005301.bin
b9556e3456d009112dd47258a6ce3157ce35d1e55e21e252ae3626adb2487bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5301 8604 bytes
font_02_sfnt_off00007075.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 4324 bytes

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