Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d8ae02550458302…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 05:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93679f742784d99beceb28bdf04f210a SHA-1: c7e9b5ba8635253a13f37f25aa04d76af813119f SHA-256: 3d8ae025504583024a342c469e287e9740f98975124cfdbcc13f46f00d4707b3
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=cocoapods++specific+version', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Cocoapods specific version' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on Shopify and static.usrfiles.com, indicates a link farm strategy, likely to obscure the malicious redirector.

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.ru/wix?keyword=cocoapods++specific+version
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/9485381926.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/satidabekimawege.pdf
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/home_behavior_chart.pdf
    • https://static.usrfiles.com/ugd/67f5f7_8233f5d5d2754063b1a115c50aa1100b.pdf
    • https://static.usrfiles.com/ugd/9b5f63_cd269c33068d43f2ab2d5a1a548dd24b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8f7d119cd7a4af69d3d0cf4b5e29ad9.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_948d6dea73254aa281d3458a643e3846.pdf
    • https://static.usrfiles.com/ugd/d162e3_def166f110ad4a7097dc17aa3449177c.pdf
    • https://static.usrfiles.com/ugd/760101_ddc61e83df894dcca2febfe7656aa8ce.pdf
    • https://static.usrfiles.com/ugd/b3bc21_7cf31a80a3d041b1bfd497c9ad06066a.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/manufacturing_costing_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/crack_2_chainz.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/adairs_queen_sheet_set.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_off00005f15.bin
d35497174ff956e88ceba0405ddcee9ef18a493bff164edc04994a81f77f4b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5080 bytes
font_01_sfnt_off0000706f.bin
72831c36c0cb6c2dfda42969733c89c75236263a63877c476e6e6259ebeee8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706F 13932 bytes

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