Malicious PDF — malware analysis report

Static analysis result for SHA-256 700cd56ce52f596f…

MALICIOUS

PDF

53.2 KB Created: 2020-08-25 01:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e920f236b981eac611022abc643c88de SHA-1: 45cdb6bba785f5d712f96508ee8882839039738c SHA-256: 700cd56ce52f596f76e2053d6d3af365a789af2b547e448c4ad5d5c640539759
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Cheetah facts and information' and the malicious URL, suggesting a lure to a phishing or scam page. 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.com/pify?keyword=cheetah+facts+and+information
    • http://files.nairegion2.org/uploads/1/3/0/8/130814280/cdafd.pdf
    • http://gezojuma.danieleantoniella.com/uploads/1/3/0/7/130776106/f4ef653989d60.pdf
    • http://files.golfdrivingrangewiltshire.co.uk/uploads/1/3/0/8/130813546/7042408.pdf
    • http://genejiw.eastcarolinaramtrucks.com/uploads/1/3/2/6/132681670/fuvefabubejosi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/2011/4325/files/mapibatitomeliwokusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/89860094208.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/bmw_x1_2010_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/second_law_of_thermodynamics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/vivivulekatoxorerabiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/7943/3382/files/hernia_discal_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/kedorakopupozumede.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/afrisam_bursary_2020_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/wow_encrusted_coin_vendor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/saxakowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9228/files/81315782057.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008425.bin
22c375263f9259075d1577e69599d6aebda29c95a941bf4b7e16af1738b1bd4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 5040 bytes
font_01_sfnt_off00009518.bin
4b32a15af2d05bb1fb0b405d5358b6cd21a6e4d0759fb63194fddae01c2bd928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9518 10200 bytes
font_02_sfnt_off0000b7f6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F6 4324 bytes

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