Malicious PDF — malware analysis report

Static analysis result for SHA-256 e611358e122a9e18…

MALICIOUS

PDF

39.2 KB Created: 2020-08-20 22:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b818f61d6e36173c859095f5a95e4f28 SHA-1: cc3f5e598f1b67faf726adfaef58a835564a8dc3 SHA-256: e611358e122a9e18a4b372bb26b5f526c5721796d17d3079c4d13d38825fa629
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO spam or link farms. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains text related to a product manual and the malicious URL, suggesting a lure to trick users into clicking the link.

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.ru/pify?keyword=altair+aerial+aa300+manual
    • http://files.reysroast.com/uploads/1/3/1/8/131872017/7284437.pdf
    • http://files.lorifurbush.com/uploads/1/3/0/8/130814254/lopiwuvivodixu-xidito-teteweg-vataduvol.pdf
    • https://cdn.shopify.com/s/files/1/0445/8260/0868/files/vudosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/45483791834.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/84508333151.pdf
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/kaxad.pdf
    • https://cdn.shopify.com/s/files/1/0445/8813/8660/files/parasitologia_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/biwijesisuzufugusojewolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/arixtra_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/300_rise_of_an_empire_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/vadomemowugoxalanotofij.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_off00005c9e.bin
08a5eeb069e86998ff6b26c8a71dcb815055c460b967bbbdffff83d4d1ca4b1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9E 4948 bytes
font_01_sfnt_off00006d54.bin
502520c345a3f9445a0a8574f38ad41468ff097a67a45bc785f656abfddc09b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D54 10208 bytes

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