Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93b732502508764…

MALICIOUS

PDF

40.4 KB Created: 2020-08-20 22:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52804771358f5976bc7ae8e9e77c7d73 SHA-1: 38db02f2aa130b0af8c77ec4790b6534cbcc17cc SHA-256: f93b7325025087644632a77f67eaa082ef50db93492e0f2cf203c0cb7ec71a7d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=spreadsheet+compare++microsoft'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. The presence of a PDF link farm heuristic further supports the malicious intent by indicating a large number of external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and references to spreadsheet comparison, reinforcing the lure.

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=spreadsheet+compare++microsoft
    • http://files.tenthstreetmiscellany.com/uploads/1/3/0/7/130739369/sifofagafexew.pdf
    • http://files.topicalbiblestudylessons.com/uploads/1/3/1/6/131607029/naxitag.pdf
    • http://files.watips.net/uploads/1/3/0/7/130775520/9695308.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/22327702518.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/jawurumatobivolus.pdf
    • https://cdn.shopify.com/s/files/1/0447/6341/4682/files/tapavezimobapuxumurug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/workbook_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/suvisarokizetenovot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2188/3816/files/vonodewudowamerupebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/lamulelemiwalijar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/11027614668.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/kudupazuzinijeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/52184446880.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc2.bin
02b73c42d03524971a6331e26fa476706a006661a60ff6f68ccb050e86aec068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5464 bytes
font_01_sfnt_off0000722d.bin
c8639433b4ea05aeb13f4e24c1941445d401875612278c4c8af68c40d0a7a965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722D 10128 bytes

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