Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2c449945ad1998…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 17:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b59ff4853f3a49837ed562aebaa574 SHA-1: 9bfd3eb50ea6d6591974f21dce001c544a127ec0 SHA-256: aa2c449945ad1998d2d15e95c96ae1f715aabd2452ed3744c5702ebbb9b5a849
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure related to a LinkedIn profile picture, directing the user to a malicious redirector URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to obscure the true malicious destination or to create a link farm. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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=your+linkedin+profile+picture
    • http://files.scarfitup.org/uploads/1/3/0/7/130739802/8395a5.pdf
    • http://files.taniajanenaturally.com/uploads/1/3/1/3/131378776/zogodigenared-robonezuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/nijogebomur.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/30634725789.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/5071393568.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/56134019954.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/feninu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/13802312648.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/types_of_balance_of_power.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_off00006a96.bin
1cf66ad4134d911e04e23464da0b4adc05cd26e1af12780177b831fc928cd93a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 4784 bytes
font_01_sfnt_off00007ae9.bin
0c9c3228d7df69a4bf2e2a76fe78561d17b9cc4a12264b62251695b4c81c2cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE9 10168 bytes

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