Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88c91f33618e9e5…

MALICIOUS

PDF

39.3 KB Created: 2020-08-26 08:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50551ca449345c7a8f756b77a0fb662d SHA-1: 4909963bde443b15e5a5959054624d30e59469c1 SHA-256: a88c91f33618e9e50c62e29ba1d528d33ab1de661fb26a12bbd910d0d74bcdbc
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, indicating a link farm strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on Shopify, suggesting a coordinated effort to lure users to malicious content through a chain of redirects.

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=nessa+devil+casting
    • http://denurora.crystalcrichlow.com/uploads/1/3/2/6/132695924/letovodarewoxujuge.pdf
    • http://nuxikupif.jenniferkelman.com/uploads/1/3/1/3/131384401/a6059b2.pdf
    • http://files.maryamkdesignsai.com/uploads/1/3/1/4/131437983/132ca053087aeb2.pdf
    • http://files.audreylewisinteriors.com/uploads/1/3/2/7/132740545/ad1c3b56a47b.pdf
    • http://kaged.ashliebailey.info/uploads/1/3/1/3/131378780/mowudiwixivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mizamolapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/ielts_general_writing_task_1_and_2_samples.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/97382311708.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/manorama_yearbook_2020_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/62858295099.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/44820941825.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/konaviwoxizogalu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/49740353960.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/the_definite_article_and_zero_article_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cc0.bin
93956eae40b1677fcff1e8b15c574e0a189cd43b7703a5ab2c049d41164e7454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC0 4720 bytes
font_01_sfnt_off00005cdc.bin
9c16d360c232ec18f7a15db89b00816ef1606e2f1f187fb2c330497965f961fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 11084 bytes
font_02_sfnt_off00008292.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8292 4324 bytes

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