Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff508d3bfbec891…

MALICIOUS

PDF

34.2 KB Created: 2020-09-22 01:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57092b5b16453ae935f40bde0464e7eb SHA-1: c0832b6dcf90792ab261fb229e036700e6229f74 SHA-256: bff508d3bfbec8917d402697e565e43150e7bb90e760427f3d068cae3ebcf6fa
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.club/wix?keyword=canton+high+school+il`. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect the user to malicious content.

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.club/wix?keyword=canton+high+school+il
    • http://judup.carolinegoldbergigra.com/uploads/1/3/1/3/131381204/6b578e5.pdf
    • http://files.madisonguebert.com/uploads/1/3/1/1/131163841/pamakaduwega.pdf
    • http://kopixagu.omanaiaschool.com/uploads/1/3/1/4/131454237/282152.pdf
    • http://files.nurturingtouchspecialist.com/uploads/1/3/1/1/131164531/693565.pdf
    • http://files.coachchriswoodside.com/uploads/1/3/0/7/130740123/wewosixo_busidalamixejup_lefifogulusujuf_zinanuzakole.pdf
    • http://files.stpeterstw.com/uploads/1/3/1/1/131164231/5301581.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/puxatuvirajokomove.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/jayce_top_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/40966471512.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/metv_on_directv_florida.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/75658586024.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/lopariwijisixexifob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/ti_my_country_2020_hack.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_off00004994.bin
056eb5047a4d99abbd8a2a8b076951d2a273646ad12d43c489f16c59a5e5715a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4994 4868 bytes
font_01_sfnt_off00005a20.bin
8e3718f330a09f9ac58d5f30d3a0083c5dc47eab1f9fdf32d4751b4e8cd5e70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A20 10032 bytes

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