Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9eec8c16ec35832…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 01:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48625bc0a614067c15d4428c291e402f SHA-1: bbfd5c47816d3e9a4aeda92e7845d8d362742544 SHA-256: b9eec8c16ec358325de724695de4015dfb4cb1c6c36d6c1b70abca65a1130090
120 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 a 'dumbbell workout plan' and the malicious URL itself. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO poisoning effort. The primary malicious IOC is the ttraff.com URL, which likely leads to further 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.com/wix?keyword=dumbbell+workout+plan+to+build+muscle+at+home
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/autocad_civil_3d_tutorial_2015.pdf
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/13727167588.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/astm_cold_rolled_steel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/xiratofugokibasoged.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/beneficiary_form_per_stirpes.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_f214cd970d634ca69ff74da9b6ee250c.pdf
    • https://static.usrfiles.com/ugd/9a242c_14f446fc391c4db8a36a85da4ff5600e.pdf
    • https://cdn.shopify.com/s/files/1/0460/1557/8279/files/asco_her2_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/99285635946.pdf
    • https://cdn.shopify.com/s/files/1/0455/4014/7365/files/97912387652.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/duzebakufunatapirudupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/9913316611.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/40536233543.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/zumulilujuzazabodenukeb.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_off00007abf.bin
805b0003c3611b19fbcf71c7dfd60666572bcf3b43b3b9799651a94a7e8da5d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 5608 bytes
font_01_sfnt_off00008dac.bin
3be51bb8b12641ef1609dd6196a3f91ec32eaec88f9310af30e03b359456fb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAC 9944 bytes

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