Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb35dd140b3a98b…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 04:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8db1157ddbb3b95521fde28e97759335 SHA-1: da60db8b8fcc6a4fc062fe8538ed28284e1ee84a SHA-256: 7cb35dd140b3a98b090a7ab369a553314e57f97c4bf6fee177a0102629effb1c
120 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to a URL related to 'bangladesh passport renewal form usa'. This indicates a phishing attempt to lure users to a malicious site. The document also contains a large number of embedded links, many of which point to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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.cc/wix?keyword=bangladesh+passport+renewal+form+usa
    • https://static.usrfiles.com/ugd/6116da_97e9f3e992df4a7bab6c2618b7982f43.pdf
    • https://static.usrfiles.com/ugd/fb5067_e04fdb1891994e978954b7205d17615d.pdf
    • https://static.usrfiles.com/ugd/21e6f2_cc5ddcf31e63471d9ce763c9ec24d33a.pdf
    • https://static.usrfiles.com/ugd/b8c837_abc924ab436a478fa42cac534a7d5361.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d0a4264b1b4400e996c6dcdbdfc7837.pdf
    • https://static.usrfiles.com/ugd/544c7e_5a8a8f15fd164e9ab54214d27f72d720.pdf
    • https://cdn.shopify.com/s/files/1/0437/4721/3464/files/ruwemop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/best_books_on_astrology_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/bevipamudapesomitakib.pdf
    • https://static.usrfiles.com/ugd/7ff653_84680c93d4144d4b8630e85608acf5a2.pdf
    • https://static.usrfiles.com/ugd/cc03df_0e30b68c36634931b40684a0c98f85fa.pdf
    • https://static.usrfiles.com/ugd/6da380_219f7cbe051149a48cd320985fd796de.pdf
    • https://static.usrfiles.com/ugd/b444d4_41024a7c24df40c3906f0d0d9c67a565.pdf
    • https://static.usrfiles.com/ugd/5e8de6_8fad6faa0a424c02a3b5158fca453d69.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_off00006a5c.bin
2fd38fd27f3dc96f3a25f121fcff1a8054c74c3abee05667b3ea2c2eec35595e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 5596 bytes
font_01_sfnt_off00007d51.bin
27b0a34e3cd53c7e0ad921e3088cd3039a6c7effc65262d123a8390680dd75bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 10580 bytes

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