Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d66334be1b5b502…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 05:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8afc5756804dc66f98121ba1f3b22839 SHA-1: 6b126b85bd355db2383a28e85eb3d93a59aef516 SHA-256: 4d66334be1b5b502f4e2c2c103ef9404dee44f25ca0145a9710cf24fd4817a1c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or phishing campaigns. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=worksheet+2.+7+uniform+accelerated+m'. The document body, though heavily obfuscated, also contains this URL and other links hosted on cdn.shopify.com, suggesting a coordinated effort to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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/wix?keyword=worksheet+2.+7+uniform+accelerated+m
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/82726351959.pdf
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/42151392196.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/77984269571.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6018/files/waxoligotasilotikoridi.pdf
    • https://static.usrfiles.com/ugd/b8c837_66775c8e62984023ab82d7d576558559.pdf
    • https://static.usrfiles.com/ugd/b8c837_6696f1346f22413383b16c2a7a2f1f91.pdf
    • https://static.usrfiles.com/ugd/a2e20a_b3081acac31f4925afee36013e142ed1.pdf
    • https://static.usrfiles.com/ugd/8de238_e59da2db9ec44b72aa678e4be8b94dc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2069fcc385d483c8417b5d2b6ac7d3a.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/adobe_reader_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/4507/6647/files/86011906996.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/77317208217.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_off00006f4b.bin
6e3b6e84c6423459c870d44fbd9abfb5ecfc8ed986bf74100fd65e34e705d1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 5580 bytes
font_01_sfnt_off00008234.bin
4de28f6b2a67ab0aeffbbc00d28065972b3fe3b87b53dd5856ee7f602a222e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 15600 bytes

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