Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde9cf0a531de2a0…

MALICIOUS

PDF

49.9 KB Created: 2020-08-03 12:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b84967000baa765330a3c8954c9f84b SHA-1: bec0ed37bbcbeb048aa6b7641ab49d0f30773616 SHA-256: fde9cf0a531de2a0b044004490f37f45896a57cb227f8ebc5d1e75263f04e1c1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=vestige+rice+bran+oil+pdf'. The document body, though heavily obfuscated, contains text referencing 'Vestige rice bran oil pdf', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=vestige+rice+bran+oil+pdf
    • http://files.bankslaneinfants.org.uk/uploads/1/3/0/7/130775249/rajuma-tipufow-zarubuxe-xidunagowimosi.pdf
    • http://files.sonomadrivingtours.com/uploads/1/3/1/3/131380616/nalovilep.pdf
    • http://files.morroandjasp.com/uploads/1/3/2/6/132681992/lovemewotomiwinuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/jowuwufibib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/insert_checkbox_in_excel_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/99182149805.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/pubigirinijepelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/45599287978.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/2954781112.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/jirewibupufetokugoragax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/25975269025.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/sobokolemofafoxeriloki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/hunter_xc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/76966109127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/2506172033.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_off000063c3.bin
ec05f5d749453ca9e8978b5a9de6d49f543806019a5c3203803ddeb185de325c
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 7008 bytes
font_01_sfnt_off00007b3a.bin
6c2725d7b33059cff1217d6fba654fb93ca52edcbfb56003d87288924d1b661f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3A 5428 bytes
font_02_sfnt_off00008dc2.bin
5965b8b7d622d1d1bed63625c3cf25f0bbe02dc1a940cdeccefd5bd514648e20
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC2 14192 bytes