Malicious PDF — malware analysis report

Static analysis result for SHA-256 b329fc548ed45275…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 05:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d31453a61113449324207d7199e65f6 SHA-1: c60a196678cb900d8da43314962b5e61f02f0adb SHA-256: b329fc548ed452752b2fef1329334086bb4e6693d7bef205bf7f9d7b28bfce24
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector, suggesting an attempt to lure users to malicious content. While the document body contains garbled text and a seemingly benign search query, the overall structure and the presence of the malicious redirector indicate a deceptive purpose, likely related to SEO manipulation or driving traffic to malicious sites.

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.ru/pify?keyword=christian+music++app+for+android
    • http://files.mcleanboosters.org/uploads/1/3/0/9/130969204/328b244c80658a5.pdf
    • http://files.thewineswirler.com/uploads/1/3/2/7/132740865/ee3c0f6b96212d6.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/repesajavifuvigeb.pdf
    • https://cdn.shopify.com/s/files/1/0450/7897/0533/files/addison_wesley_mathematics_9_ontario_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/75658407487.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/67811918918.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/20932494895.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/lapezopimate.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/44829439749.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/43671363513.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/mowaturokelamekuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/klein_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/gimonutijuxokesukaji.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_off0000639b.bin
43abc5b642290301e728d96b6b6299b1d6c9c4f0e7aa3f8249a84c68bcba2893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 5268 bytes
font_01_sfnt_off0000754f.bin
62e552e9111ae5bfa70ca17d6f07ed5bcb491d6f06394b4f76e221d51b4f5a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 9680 bytes

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