Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cd279720ddfbdf…

MALICIOUS

PDF

56.4 KB Created: 2020-07-29 00:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98e3f13e0926d2ac7216a31acfe35d3a SHA-1: 6bb34c09d3fe4fc87d94bc20b917bd2ee80b8c92 SHA-256: 85cd279720ddfbdfe100e005f2e37224723f0c2a8640715663ffa8d5ce65cec1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to back pain and leg tingling, likely a lure to disguise the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dolore+alla+schiena+e+formicolio+alle+gambe
    • http://files.manoliskaratarakis.com/uploads/1/3/0/7/130738940/64ad6e1a45f92d.pdf
    • http://files.aawcphilly.org/uploads/1/3/1/3/131380850/pewub.pdf
    • http://files.heavenonearthlove.com/uploads/1/3/1/3/131380604/tinom-kividigew-kipaseroxasev-paziz.pdf
    • http://files.univ.ency-education.com/uploads/1/3/1/8/131872021/panugofowaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/68672654522.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/kelolufonaxuvupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/nodojuvavuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7220/9574/files/5553208867.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/19688950879.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/gobofiguwuvofeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/92688505538.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/73372216618.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/6703694450.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/zunakuwo.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_off00009d04.bin
bfea7a62cbc6a8e133032297b47a4c7195262327b985430d37ac89401b20398b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D04 5140 bytes
font_01_sfnt_off0000ae44.bin
b15cd0d56ed66a64b867b7b7a18f9a71a4682f3191b0ceec3419b29e7c4d3812		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE44 11228 bytes

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