Malicious PDF — malware analysis report

Static analysis result for SHA-256 9157f4bd409919e3…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 03:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69dff59a5710cb9a1e77a11289cc65dd SHA-1: 2ec9e4fe7e50206f526d9a8562c30118be83f52b SHA-256: 9157f4bd409919e3a5bb206f8c3ff950c30b7abe460c91ccec305889000b3304
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=arabic+fonts+for+adobe+photoshop', suggesting a lure to download fonts which redirects to malicious infrastructure. The heuristic firings confirm the presence of a malicious redirector and a link farm.

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=arabic+fonts+for+adobe+photoshop
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7162/7673/files/24031387299.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/article_about_bullying_in_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/digej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/bekusiforuxaxaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/difference_between_horizontal_and_vertical_axis_wind_turbine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/butafosalisap.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/7564569280.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/89159779483.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_off00005843.bin
291784d870967ca42955174b510a7214d521c71389af757e82310c07d46d4914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5843 5340 bytes
font_01_sfnt_off00006a5c.bin
dae519cf9445cc8164438262dcbff59a44da187a549fcfc43cfee44b7461d93c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 10036 bytes
font_02_sfnt_off00008cd8.bin
68f020e6a32bd9662cc5d8dc176958970b5c63249990a84832477509c0a3d867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 16884 bytes

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