Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85fe9cf48ab0e9f…

MALICIOUS

PDF

52.2 KB Created: 2020-09-05 14:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fd66f2e47fe1138707453743c832027 SHA-1: a712900bc757fa137b41e4f6eb741bf5273f7b6d SHA-256: b85fe9cf48ab0e9f50e4995029385ee9db2a37f3c687bf34770ead2255203d7e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious websites, potentially for phishing or malware distribution. The presence of numerous other links, many hosted on cdn.shopify.com, indicates a potential SEO link farm strategy to improve search engine ranking for malicious content.

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=calendar+template+html5
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/fidixinediru.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/vejetikexozugisema.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/dixowezitup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/vejifelufuzejapivowoxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/5204095255.pdf
    • https://static.usrfiles.com/ugd/7c3584_a90e9cf4b6564b3696ddd4897a0fb968.pdf
    • https://static.usrfiles.com/ugd/cb2bed_2203a2b66ddd416895a33450677b4752.pdf
    • https://static.usrfiles.com/ugd/ee6770_e2abfb08f4484d708c5e77d3b54714d3.pdf
    • https://static.usrfiles.com/ugd/625844_8f1c062bfbe84d7eb30647c72ec6469c.pdf
    • https://static.usrfiles.com/ugd/f96b02_29a6db8c2c9f49a78a3b89f1ee4f3e9f.pdf
    • https://static.usrfiles.com/ugd/110ef3_4506bd4335a5476a8932a456619d16a1.pdf
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/reading_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/florida_collections_textbook_6th_grade.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_off000085e9.bin
1f2f2319d8d159f5b899427df81eb2ccf2cdc26e36c40252d90d315a655c66ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E9 5048 bytes
font_01_sfnt_off000096e3.bin
3c1d446bd75e60894416e4eaaffb4e8c7c72ed03037f19271dc8b9d2c637c543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E3 14384 bytes

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