Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fec8a4552fc3195…

MALICIOUS

PDF

40.6 KB Created: 2020-08-25 20:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438b64a7f483cbc2618075ade23ab34f SHA-1: 5dfad473d9407d55872606ae26a29b1184bf2e13 SHA-256: 7fec8a4552fc3195711f8e407236878f01b01a0a0d56eb848670e785bbd03a76
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=legally+blonde+book', suggesting a lure to a malicious site. The presence of numerous external PDF links, including one to 'cdn.shopify.com', indicates a link farm used for SEO poisoning or distributing further 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.com/pify?keyword=legally+blonde+book
    • http://files.achch.org/uploads/1/3/0/8/130874655/25a95a554ebcbb7.pdf
    • http://files.madire.com/uploads/1/3/1/6/131606563/2923126.pdf
    • http://gufopaz.ontariochristianchoir.com/uploads/1/3/1/3/131378779/9931189.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/knowledge_smart_revit_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/beat_saber_size.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/57061534254.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/sexazibowetugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/56100629648.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/jibibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/factorio_solar_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/sozixefigutugewejerowabeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/13241531028.pdf
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/14746301588.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/64781225597.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_off00006257.bin
ba312505684f3311189d5ceb8ddc8e3105b7ecef1fea12b6be6e6d4cfb5f895a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6257 4964 bytes
font_01_sfnt_off0000735d.bin
adfd61e595777a3d3dcfb468c1a5e4bdf4713b0a491fea0430ce0da6874701b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 10120 bytes

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