Malicious PDF — malware analysis report

Static analysis result for SHA-256 d219b331d6a5d6f0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-15 09:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6256ec208b72c0d087e47130b241abe SHA-1: 6f316e8804b186caa18d00afa107ed225d72bce2 SHA-256: d219b331d6a5d6f0d85900b7455ae5df16e46be8045663fa23351bf3fbeca31d
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body text and embedded links suggest a lure related to file conversion, likely to trick users into visiting the malicious URL. The presence of a "download button" heuristic further supports a social engineering attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=online%20file%20converter%20.pdf%20to%20.docx
    • http://pezim.fexasas.com/uploads/1/3/0/8/130873851/votubisefopizoxorak.pdf
    • http://files.roboticscity.com/uploads/1/3/1/3/131398022/1014141.pdf
    • http://files.ndavidhubbardlmhc.com/uploads/1/3/0/7/130740392/d2e575252a9c2.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/walizilozagovodumot.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/chudy_tata_bohaty_tata_kniha.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/can_t_be_guarded_scoring_system.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/58095289522.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/xamaxegapijes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/94919382773.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/56617380652.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/guia_holman_apologetica_cristiana.pdf
    • https://cdn.shopify.com/s/files/1/0433/5661/8911/files/zalejepad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/27687778479.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/reputational_risk_management_in_banks.pdf
    • https://cdn.shopify.com/s/files/1/0429/1834/6915/files/acetilcolina_farmacocinetica_y_farmacodinamia.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/83405851699.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/98033314794.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006780.bin
139e6c0122daf0c501728fed2f27b8281a8c47340abbc7c5860cbe8ea9b4846f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 4736 bytes
font_01_sfnt_off000077b7.bin
534ded42e897f3e112fceb67fd4f5fe2a718c1de1cce9ac209247e2dfd54e2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 10300 bytes
font_02_sfnt_off00009b09.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B09 4324 bytes

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