Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e758e0318695dc…

MALICIOUS

PDF

91.0 KB Created: 2020-07-23 18:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e2946af84a7e7ec6f43b36bb4803370 SHA-1: 35554d67e3e8a518b80a6a6830f95922ac1fc40e SHA-256: 89e758e0318695dcff45be2c3a2f20014dc5e83ba91d826e2a0c075a7781d59a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Alvin chipmunks songs' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious infrastructure via these embedded links.

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=alvin+chipmunks+songs
    • http://files.finaldraftedits.com/uploads/1/3/1/8/131856987/rexewekikuwifa.pdf
    • http://files.curatedclasses.net/uploads/1/3/2/6/132681826/eda5cb6e5.pdf
    • http://files.ardenbuildingservices.com/uploads/1/3/2/7/132740267/6a6726a7eff.pdf
    • http://files.bluesystem.ca/uploads/1/3/0/8/130814430/buzeno.pdf
    • http://files.thesoulsalchemy.com/uploads/1/3/0/8/130814687/gonuror_jelegusugajo_gujisanolose_pugijuzepe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/21509683409.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/37342388731.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/difudafidusebazul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/12462148972.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/83653434722.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/67170882732.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/wapalulotutuzixoniz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/xomogizanazagajuxetog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/97142758362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/63003892479.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_off00012b20.bin
e5648a5bc6374b29e3997684bb07fd6e10c78e16288f42925fde2bcb91e33e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 4840 bytes
font_01_sfnt_off00013b5f.bin
058f9f478e13351c65eb18d0100e3fc3e3ca24fb1c62b33db74baf97d6836ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5F 10280 bytes

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