Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee03cc42973aab5…

MALICIOUS

PDF

41.1 KB Created: 2020-08-06 00:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdfa99e24760abf28bee32693088602f SHA-1: 00b1a3600d0c1d5b3abd15152e3e5ef46c2c58e2 SHA-256: 4ee03cc42973aab5c58157d867964d84c79cf284b00f850bb470d5547dda7483
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign-looking documents on Shopify, but one critical link redirects to `ttraff.com`, identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic suggests an attempt to obscure malicious intent or distribute content broadly. The document body, though partially corrupted, contains the malicious URL and references to technical documents, likely a lure.

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=shielding+and+deshielding+effect+pdf
    • http://files.twistssponge.com/uploads/1/3/1/4/131453333/jufula.pdf
    • http://files.isorhythmsmt.com/uploads/1/3/2/8/132815752/8e34c7b.pdf
    • http://files.hallelujah-lighting.com/uploads/1/3/1/4/131407823/4466680.pdf
    • http://files.greentreeassociation.com/uploads/1/3/0/7/130740517/koxoke-xunigex-titenowesubi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/ppm_modulation_and_demodulation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/jezabozamokukiguwut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/vazonotojutudaxopajaxowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/64175868624.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/faa_aviation_weather_services.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/kenmore_series_70_washer_won_t_drain.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/25171231593.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/81345294306.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/ravak.pdf
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/kotumuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/95177790740.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_off0000617e.bin
ea378aaef90d26eb5c0dd7c0eb0c4d31a6b8961762e9d98559577506a1e8537e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 5424 bytes
font_01_sfnt_off000073f7.bin
302b2eb5daff508349c80fa95d8515e967e9c6e561eea26adb2cc38bc1262b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 10392 bytes

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