Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f572c98323006b…

MALICIOUS

PDF

53.4 KB Created: 2020-09-06 18:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9644bbd85ffde6744a8ee46d729b9b6c SHA-1: 7951c9633feb087439d393d719211e1c0199a995 SHA-256: 23f572c98323006b2a3d2e9db2c1926363077865c324083dfbf9031770c0f18e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=amman+god+songs+tamil+free'. This indicates the document's primary purpose is to redirect the user to a potentially harmful external site. The presence of a large number of embedded links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, but the redirector link is a strong indicator of malicious intent.

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.me/wix?keyword=amman+god+songs+tamil+free
    • https://static.usrfiles.com/ugd/733c1f_7ab004854af1401588a819ac1c344036.pdf
    • https://static.usrfiles.com/ugd/c618e9_25311d0dfa704f7386f1f492117df7f2.pdf
    • https://static.usrfiles.com/ugd/44b221_1dfef830a82f47e68fd68cd813753d6d.pdf
    • https://static.usrfiles.com/ugd/121e37_26fdeee0353b437bb7dad7ed3fa440ef.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/nenetaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/delulesevumisikitoleruf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8713/files/78645748553.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/3m_healthcare_product_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/26456758368.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/65173170333.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/cambridge_b2_speaking_exam.pdf
    • https://static.usrfiles.com/ugd/72216b_4d3b703018cc4ca8b7ecc379657a2284.pdf
    • https://static.usrfiles.com/ugd/136d07_67eb5d5b91494292bd59627949ce2b91.pdf
    • https://static.usrfiles.com/ugd/fd7405_1035583b2dfb43b6b03191a3b11bf24c.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_off00008d1e.bin
03fd95cb9f8c6a9e8d8a062bfb2a0e698af9542b1f3f3d9e32fded17c512b389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1E 5216 bytes
font_01_sfnt_off00009ec7.bin
d4c4c8520564db5c82cbe663cab36204929f53688c53ccfbe2d341af872680ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC7 13388 bytes

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