Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f773abfc8ea90a…

MALICIOUS

PDF

70.9 KB Created: 2020-09-03 16:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ee2558c6f721659688881869f72d0ae SHA-1: e7a42e2645dc70f1e5be7ab0620dd5aa9ef0353d SHA-256: 31f773abfc8ea90ae5de29fafd7b76872912db87ec3e39601dca33bd3057dcef
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 'https://ttraff.club/pify?keyword=acneiform+rash+panitumumab'. The document body, though heavily obfuscated, contains this same URL, suggesting the PDF's primary purpose is to redirect users to this malicious site. The PDF also contains a heuristic for a link farm, indicating a potential SEO poisoning or spamming campaign.

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.club/pify?keyword=acneiform+rash+panitumumab
    • https://static.usrfiles.com/ugd/de02f3_ccad05a7d851490d8ce431b0448a45ac.pdf
    • https://static.usrfiles.com/ugd/49be48_bb53023fd9ac4090afdf0d01904d63a9.pdf
    • https://static.usrfiles.com/ugd/856cea_380034efbde5471484641713d452c85d.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/33060471409.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/chainsmokers_new_songs_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/99619346098.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/28754553093.pdf
    • https://cdn.shopify.com/s/files/1/0437/6887/3112/files/fofexemimevame.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/brazil_vs_peru_match_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/github_commit_command.pdf
    • https://static.usrfiles.com/ugd/05900a_ca98545bbad64b419f3ebdb17359efb5.pdf
    • https://static.usrfiles.com/ugd/ac8c68_bd335ad2d7d84a12acc86fae53c00660.pdf
    • https://static.usrfiles.com/ugd/4c76bf_08abd8b96435405eaa8be503c234eec1.pdf
    • https://static.usrfiles.com/ugd/cf79db_a2db7580bcb648f4b14ca84937f0d1fa.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_off0000d0c7.bin
143dccecbbe4f08111ea98effec306f31c4dafe4b9fd99137113f973732aa9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 5352 bytes
font_01_sfnt_off0000e2cb.bin
6ec291305671a2a26a140847a69848a67c6712cc33da5a9d4ff101f9a69a61e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 13716 bytes

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