Malicious PDF — malware analysis report

Static analysis result for SHA-256 5680f8c736b8c8ff…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 02:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab3b4d17a60c9704246a491ddfda4253 SHA-1: 408d9899b8583647cefe17dd34c0f94f4da43395 SHA-256: 5680f8c736b8c8ff4e722351a768a06b01f874d8be0a9075d8494e103c338d4c
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=severe+side+effects+of+metformin', suggesting a lure related to medication side effects to entice clicks. The presence of numerous other links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination. No scripts were extracted from this sample.

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=severe+side+effects+of+metformin
    • http://bonofalas.gcctraining.net/uploads/1/3/1/3/131383483/3412988.pdf
    • http://files.glencoeflorist.co.uk/uploads/1/3/2/6/132696483/279792.pdf
    • http://files.beeppainting.com/uploads/1/3/2/7/132710795/2967611.pdf
    • http://files.eratoalakiozidou.com/uploads/1/3/1/0/131071277/5dc7eb897eab6f.pdf
    • http://files.myfullcirclefarms.com/uploads/1/3/1/4/131438419/e8c04cd13.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/weludulifazurewofotizumap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/85337534073.pdf
    • https://cdn.shopify.com/s/files/1/0437/3060/0090/files/92075810238.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/sizaruni.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/animal_kingdom_florida_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/12290211817.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/zanidokibe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/84756990631.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_off000065f6.bin
dd45c0fa95ac8bda7493e437081f2d186e7f14c5dddc19f4425ba27c441e858c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 5088 bytes
font_01_sfnt_off0000772e.bin
cbc35e001f387bdd776dd7c6480aafdc7f84889ea373eeda019bcc3a69bd4cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 10340 bytes

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