Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c926093b64d04a…

MALICIOUS

PDF

38.6 KB Created: 2020-08-18 13:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d9c1b88885f9c8cef3c0d25aed687b0 SHA-1: 71b5e6d543c5cec92c7150223209cd497c4d4b66 SHA-256: 95c926093b64d04a01a7df7f745bab36b7e9084b9a7e90de6c9813e19ca53503
120 Risk Score

Malware Insights

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

The PDF document contains a link farm and a redirector link that points to malicious infrastructure. The primary malicious URL is https://ttraff.ru/pify?keyword=deutsch+albanisch+w%25C3%25B6rterbuch, which is likely used to redirect the user to a malicious site. The document body text is heavily obfuscated and contains embedded URLs, but the heuristic firings clearly indicate a malicious redirector and link farm 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=deutsch+albanisch+w%25C3%25B6rterbuch
    • http://files.timelyap.com/uploads/1/3/1/4/131437311/selaridov.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/diwipexobusemugubemuzewum.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/youtube_on_repeat.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/kebuzeked.pdf
    • https://cdn.shopify.com/s/files/1/0451/0393/9749/files/minecraft_mods_minecraft_1._5._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/anacardium_occidentale.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/91402412765.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/xejowifenubuxujoxuxes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/wolejofazofunizo.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_off00005661.bin
45b199172695337b0c6381cded98d025273356fdd9279f3f258bbe7e9ea326f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5661 5256 bytes
font_01_sfnt_off00006801.bin
153d3f26745e56141fb6d95d0512963949d1511447c50aaccfad145f5ef87ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6801 11172 bytes

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