Malicious PDF — malware analysis report

Static analysis result for SHA-256 81825bd9bdf41d32…

MALICIOUS

PDF

39.0 KB Created: 2020-08-16 15:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74e23d737e9e46553add75c19925a327 SHA-1: 38baaeb096278430bc92db9388294220b9a30e7e SHA-256: 81825bd9bdf41d32ed1e3e0f373d11d24d409e7ed41aa763777bf17685e98ab3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=alcatel+idol+4s+6071w+android+rom'. This indicates the document's primary purpose is to lure the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to obscure the malicious destination or leverage benign infrastructure. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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=alcatel+idol+4s+6071w+android+rom
    • http://files.proreefcorals.com/uploads/1/3/2/6/132680860/kuxixutovadigazazade.pdf
    • http://files.certcpr.com/uploads/1/3/1/8/131857421/5060831.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/25381460129.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/kekomukoxom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/17125400638.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/mindtap_principles_of_economics_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/74383484124.pdf
    • https://cdn.shopify.com/s/files/1/0448/1715/4208/files/cutting_edge_upper_intermediate_student_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/string_theory_david_foster_wallace.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/wuxefodukasoxakexiwebibiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/happy_birthday_piano_chords.pdf
    • https://forums.windowscentral.com/showthread.php?t=476813&s=f4fd912fd892efeba35db0fcc2740635
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.windowscentral.com/showthread.php?t=476813&s=f4fd912fd892efeba35db0fcc2740635
    • 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_off00005823.bin
ee2f44454fef84eefe3e002ebe0a40a50681bea80959218effb10fd6ed4ae3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5680 bytes
font_01_sfnt_off00006b71.bin
9f8305555ee0da2b744ddd4efa053c615080373a67be34ecec6ae5a35ba66490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 10548 bytes

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