Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3346e0e91ddc821…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 02:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a43e714a45b4b8e99b332b0a702bf82a SHA-1: bc3aa4ec106f4299f4fb2e17cfd0b2a8db7ad851 SHA-256: d3346e0e91ddc821dbfa37f00df19dfa244fa12316a0844fd8674f2e44a916ad
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a D&D character sheet, aiming to lure users to a malicious site. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other benign-looking PDFs hosted on Shopify, likely to blend in with legitimate content.

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.com/pify?keyword=d+d+5th+edition+character+sheet+editable+pdf
    • http://files.mainstreetmusiclessons.com/uploads/1/3/1/1/131164414/9663980.pdf
    • http://files.owenyelland.com/uploads/1/3/1/1/131164462/zupijiwesu-nokawedetinusal.pdf
    • http://vijowema.newmexicomade.com/uploads/1/3/0/7/130775934/1833244.pdf
    • http://files.sarasotacommunitychurch.org/uploads/1/3/0/8/130873869/1df01bcb2c.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/buffer_overflow_explained.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/77221448454.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0438/9116/3291/files/69263889869.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/lojapizuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/1261664609.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/caring_for_rabbits.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/87416683959.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/40761353393.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/nunilubedaragatenome.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/83813487587.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_off00005e2e.bin
d960d751079c35ff723d66708a04662cba48d85a748c9c9882d3f0cbe83b96c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 5504 bytes
font_01_sfnt_off000070e1.bin
510fbe69a55b4b01d47d7dc269cb05b0243b14f383e443b600ef5b16fb06746a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 10488 bytes

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