Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e64f43d0a0e0a91…

MALICIOUS

PDF

45.0 KB Created: 2020-08-25 00:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 440ffb9766720594d33fdc7d12f9ca65 SHA-1: dcf8f1a1bd0d49df7f5e8e693f83d0d3f6ef2cee SHA-256: 8e64f43d0a0e0a91b59f50ccb80a5c9f14fb58a9e465f6df0ab50598ac52f044
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=adobe+acrobat+pdf+reader+9.+0+free, which is presented as a lure for free software. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm used for SEO poisoning or to host various payloads. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=adobe+acrobat+pdf+reader+9.+0+free
    • http://ramot.janetahrens.org/uploads/1/3/2/6/132682790/penozezawexilafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/identities_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/beginner_guitar_chord_progressions.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/farit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/abbyy_transformer_3._0_pro_cena.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/11929129370.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/28239075592.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/josipuzarenemetagagon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/sewiboxevilojivejel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/android_studio_linux_command_line.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_off0000647b.bin
4a1d24eb59d551df8ef1545652efa0ed229ff093c5d55b8d15779d9236ec6a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 5032 bytes
font_01_sfnt_off000075a6.bin
716f785327fb00c02752fb58af8c962af7e940dd366bbc1067b0aa5a6f22422b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 10260 bytes
font_02_sfnt_off000098ca.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CA 4324 bytes

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