Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b21e2793287de0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 10:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1791166fc905b3037c250d57cebab675 SHA-1: 87dfb41f73e053e94d94a930a0b297b351b256c2 SHA-256: f5b21e2793287de0bb09fac06b3c3ab0ea55c8fb0b5e47b72e2764203bb8d96b
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'zip folders linux' and includes the malicious URL, suggesting a lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document is designed to trick users into believing they need a password for an archive, a common method to bypass gateway security. The presence of numerous links, including those to Shopify, suggests a link farm used for SEO poisoning or distributing malicious content.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=zip+folders+linux
    • http://files.thegrownupsbenefit.com/uploads/1/3/0/8/130814769/gabudazujijazobipo.pdf
    • http://files.bigbearlakecabin4rent.com/uploads/1/3/1/0/131070238/kugusu.pdf
    • http://files.sohapp.org/uploads/1/3/1/6/131606222/8158034.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/14571238102.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/85054246233.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9835/files/58821857206.pdf
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/dobatitafutiretuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/77454740166.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/nuvatokefovefosuketugizur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/40050113226.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/rowefuvifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/39872139827.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/58257840034.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/57208455105.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_off00006744.bin
9f9818ecb29fa04e3ea63c6932a49ff86a42b387125717e6f7b3cea96142cae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 4848 bytes
font_01_sfnt_off000077df.bin
7a22c06043e323d26ed28f03dc23e0c0b1b3e8ec2ff5e542769b0505798e7557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10136 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.