Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9371c9d87a9443c…

MALICIOUS

PDF

87.4 KB Created: 2020-08-18 17:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47765bb751e9a9d34929e6427adb2b91 SHA-1: c8338499cb6b2ceb3e8bd1df42d197cf80a79930 SHA-256: d9371c9d87a9443c24bcb3a9dd50fd5bca05295688fb7e7bd29bc3126942b607
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=group+g+strep+treatment+guidelines'. The document body, though heavily obfuscated, contains a reference to this URL and the text 'Group g strep treatment guidelines', suggesting a lure to disguise the malicious intent. The presence of a PDF link farm further indicates a campaign to distribute malicious content.

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/pify?keyword=group+g+strep+treatment+guidelines
    • http://sukifopi.osborneranch.com/uploads/1/3/1/4/131453301/rikoxarap.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/49198142786.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/amity_affliction_drag_the_lake.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/22262093605.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/geginaxuziduzagen.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/netflix_dvd_queue.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/kevoxotegazivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/18295636688.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/bamomiwagivexoponiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/vejaneg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/zakofadanolidaged.pdf
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/accounting_terms_explained.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/vibabumokasaruxivifar.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_off00010f5c.bin
f6e774a0ab99208f2b6fd26cdffdebcaf2eb3ba976b6bfc78e6ee883cdb9da2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 5312 bytes
font_01_sfnt_off00012159.bin
0d70b7cb49b9c7bc5180ac0f4e95d211ffd4b7f8cfc6b09b73d80569c91c3c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 15312 bytes

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