Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17ae2e836beb80d…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 09:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9ae16f91bfd7627f0ddf6ae047884da SHA-1: c8ee8a31b8b674d5bfb359edf0e8ed7093b65f21 SHA-256: b17ae2e836beb80d831b452e4f166ee307dc7a13c5eb3536c1b91064f202c79c
128 Risk Score

Malware Insights

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

The PDF contains a lure related to a medical textbook, which is a common tactic for phishing or malware distribution. The critical heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the document contains a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=medical+terminology+for+health+professions+8th+edition+pdf+free'. This redirector likely leads to the download of a secondary payload. The 'PDF_SEO_LINK_FARM' heuristic further suggests a malicious intent by creating a large number of external links, likely for SEO manipulation or to distribute further malicious content, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf' being one of the linked PDFs.

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.cc/pify?keyword=medical+terminology+for+health+professions+8th+edition+pdf+free
    • http://files.digitalpds.com/uploads/1/3/1/4/131437464/72c3053b6.pdf
    • http://files.biocommsquared.com.au/uploads/1/3/0/8/130813448/7098367.pdf
    • http://zujab.balibidadaritours.com/uploads/1/3/0/9/130969744/relatiwekekuv_defatujukuj_mevubatol.pdf
    • http://files.michelleconsidine.com/uploads/1/3/0/8/130813550/megimubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/pezamapinosufot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/37090482825.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/89200584405.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/doxisajanim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/71210539225.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/kunozuzekulanujojozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/jadetewopefuxurefuruz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/69242296983.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/diamond_sword_id.pdf
    • https://cdn.shopify.com/s/files/1/0440/9150/6840/files/jiroditirodubi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050af.bin
488a969a83e3c2afeacb1d264d61ddabcc3a53197d52b7c2e6ce3f15e4772588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AF 5656 bytes
font_01_sfnt_off000063be.bin
b0871c1f3fa2e67bcfe968f7714c7d9b3c90bdbf9fa990ca0ebbf85a26165924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 10236 bytes
font_02_sfnt_off000086d0.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 16164 bytes
font_03_sfnt_off00009bca.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCA 4324 bytes

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