Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f2e0d0feb25185…

MALICIOUS

PDF

36.4 KB Created: 2020-08-11 18:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ab0bed168850c9529484f42d386b36 SHA-1: 7a3e095b6bc806992dbe5d85dc6076c4477d348a SHA-256: 69f2e0d0feb25185b9636d9f2d29626d6f4f33d56fb07da1655b81004e7f7afb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious sites. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a campaign to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=el+neoliberalismo+equipo+maiz+pdf
    • http://files.originalsexyslave.com/uploads/1/3/0/9/130969004/ca2abe.pdf
    • http://files.gwendolyndanielsmusic.com/uploads/1/3/1/4/131454420/a92927825a.pdf
    • http://files.autumnlala.com/uploads/1/3/0/8/130813369/4381066.pdf
    • http://files.alaskanats.org/uploads/1/3/1/4/131438639/71017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8004/8037/files/61198390326.pdf
    • https://cdn.shopify.com/s/files/1/0430/7432/2586/files/29884024630.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/midalubujirasapudaken.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/53912649713.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/oscilloscope_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/89543488878.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/supplementary_angles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/lusepusadinomapawud.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/zekujog.pdf
    • https://cdn.shopify.com/s/files/1/0434/8873/9494/files/rivojivoxesuvesodovimapit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/wedawoveda.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/pemuvixopat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/galopolegakerafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/31094394514.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c2b.bin
3445378a7b0be57abf3976e192cb41b6dbefc0e4286681bd4868085326ae5fba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2B 5460 bytes
font_01_sfnt_off00005e99.bin
42672215b65864854fbeab4eaa44e9195d56a8edee10c2cf307f3a9cb5572f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 11272 bytes

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