Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9d545e383f2949…

MALICIOUS

PDF

42.9 KB Created: 2020-08-16 18:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73e0f819b2dfe392398d01f6f66714a2 SHA-1: cc43b7bd131ae7d680436fa575da44bf565e4645 SHA-256: df9d545e383f294934f7cadee2e6b3f9a66b1b83668aadbbe643e2a927650825
128 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting Microsoft Excel is not opening, directing the user to a URL that is flagged as a malicious redirector. This URL is likely part of a phishing or malware distribution scheme. The document also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious content.

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=microsoft+excel+spreadsheet+won%2527+t+open
    • http://files.standrewgroup.com/uploads/1/3/0/8/130814788/kuzebajo.pdf
    • http://pabove.cravefashionatuva.com/uploads/1/3/0/7/130739415/b54d1444508.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/ganalolusiwuginodev.pdf
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/97707515788.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/ingersoll_rand_t30.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/youtube_to_mp3_fiber.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/dopese.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/65581273060.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/19041176526.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/61713046487.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/anatomy_sketchbook.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_off00006815.bin
8eaa1409f3bb7dfb6bbb40eed5589fe7f0e78438af5346032e27399d25d8910b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5444 bytes
font_01_sfnt_off00007aaa.bin
04c5b10422d400ed8766a82af6830d01ec12bfa2b386b36faf48aed34d0fb950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAA 10768 bytes

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