Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe730922c2004b7…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 22:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829f5f036bd9b8ae7db663040a722270 SHA-1: fe64845fb24f7253959c2e22069594c4ce2d8ab0 SHA-256: bfe730922c2004b775dfcfc8e8963d695bc3d1f50accdd49eb1107a1e1b08e45
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a free download for 'Tally GST notes', which is a common lure. The primary malicious URL, https://ttraff.ru/wb?keyword=tally%20gst%20notes%20pdf%20free%20download, is identified as a redirector to potentially harmful content. The document body, though heavily obfuscated, contains references to the lure and the malicious URL.

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.ru/wb?keyword=tally%20gst%20notes%20pdf%20free%20download
    • http://poweviga.thejoyofcruising.net/uploads/1/3/0/9/130969059/114984.pdf
    • http://files.pawprintzwny.com/uploads/1/3/0/7/130740141/3806184.pdf
    • http://sufinaze.mindandworld.com/uploads/1/3/2/6/132695615/zekatiloberu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/55409209214.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/75648848327.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/13537762501.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/levijaretakarobebojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/luzibotavovom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/80276412607.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/ralodej.pdf
    • https://cdn.shopify.com/s/files/1/0454/3823/8878/files/basal_bolus_insulin_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/35728532236.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/31949930912.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/financial_analyst_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/vijov.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/pdf_para_colorear_paw_patrol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/e2_80_9cvision_bundle_e2_80_9d.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_off0000650b.bin
2fcb13a82618d398197d2e5f0475ec69549ce187650de3f84de5617fb952aaa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 5352 bytes
font_01_sfnt_off0000776e.bin
e2624d98662ca23d98a65c5711532a3dfadc3ccd00706b82f080fc6b6d607345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10736 bytes

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