Malicious PDF — malware analysis report

Static analysis result for SHA-256 82926c27049678b4…

MALICIOUS

PDF

50.7 KB Created: 2020-08-03 03:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b2067c63c390959f8ca9e69605c290 SHA-1: 07730c0488a398b1216e9c0c20963a44a48c448d SHA-256: 82926c27049678b4e1a3f7105decd29669aec2ff71d8b5ad43db7e48fe47b5bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including a redirector to 'ttraff.cc' which is flagged as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=discord+record+audio', suggesting a lure to trick users into clicking a malicious link. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=discord+record+audio
    • http://files.westviewcheerleading.com/uploads/1/3/1/4/131438216/wememuvuvasal.pdf
    • http://files.geropsychtech.org/uploads/1/3/1/3/131380539/rufosarazamufo-rijup-papisobar-gabekavir.pdf
    • http://zenukofon.dogswagco.com/uploads/1/3/1/3/131380480/2812edd.pdf
    • http://files.wellsboules.co.uk/uploads/1/3/0/8/130814397/febexikopasuxasuw.pdf
    • http://files.dropertytax.com/uploads/1/3/2/7/132740541/lovuwinozuxexajapare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/95976535730.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/85669944789.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/regizidizijedasizupinafof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/fetajagunogogitawagoganox.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/awakened_house_of_night.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/9651456351.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/56172509547.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5397/files/54105635821.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/bigokilibaxumuku.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/80388108617.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/tokutevevusibuf.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_off000089c5.bin
3b82e2ef06b7593d51484f66bd074dbdb8c2ba4f0275a32c031425cee5181fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 4900 bytes
font_01_sfnt_off00009a7e.bin
2ad8dd2dbaa30f30a62ef914c7a0fb550d790082576e5ec12bc18576b43d19ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7E 10320 bytes

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