Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b3ff09be5147ef…

MALICIOUS

PDF

51.3 KB Created: 2020-08-03 07:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a63db1fb11c51ba6d8e571a301511f58 SHA-1: 3048f8049f2e3f1383ed4e504821edf45808d4b2 SHA-256: 95b3ff09be5147efbeb30efb122960e61ab67b5eb83a234b57c9c45c61e3cc03
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'state capitals zip codes' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=state+capitals+zip+codes
    • http://files.burkholdernutrition.com/uploads/1/3/0/8/130814676/fofojujinumo.pdf
    • http://files.friendsofchristfoundation.org/uploads/1/3/1/3/131383889/7405099.pdf
    • http://files.cemcaracing.com/uploads/1/3/1/0/131069869/8da3c559.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/dajurutogazo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/fe_electrical_and_computer_practice_exam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/dejek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/nuwazutesovopepakutox.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/risidixixiloguwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/sonizozedoxerixikiwizobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/dogujogatajelojanasoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/najatezometirozapolimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/85379741290.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/96165863317.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/tezexevuputojifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/difeso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/97416501365.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_off00008418.bin
914760e82dbdb8c80ff372c5b394991b0fb82d7f8aa70f68bd58690f2dd1dec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 5124 bytes
font_01_sfnt_off000095a0.bin
466100377bcb03c33fccf14e26210b0905afb1e6a23462dce89b49524f903895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A0 13180 bytes

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