Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0a9a8c4d3de1be…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 06:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ac1d444fc6b4c111380ba9852686d4e SHA-1: 552ba173dc1702299f392166a9d0ed1f26620d9b SHA-256: 5b0a9a8c4d3de1be34937c9645574d4f3d3a3a2ba5e42cf1f4a61bdda88dd5ef
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits characteristics of a PDF SEO link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=understanding+computers+today+and+tomorrow+15th+edition+pdf', suggesting a lure to a malicious site disguised as a search result for a book. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or malware distribution attempt.

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=understanding+computers+today+and+tomorrow+15th+edition+pdf
    • http://files.sarnetfl.com/uploads/1/3/2/7/132740375/eeecd2ac200fc.pdf
    • http://files.therisingstars.co.uk/uploads/1/3/1/6/131606109/6942774.pdf
    • http://videzegiv.santacruzmasters.org/uploads/1/3/1/8/131856462/jinomew-sufoli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/dojonijabenitisuzis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/kagesifegubugexoluvoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/altruism_questionnaire_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/gekefupetezopulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/1_99_woodcutting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/kirakejuxumijofaxodorir.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/pokemon_ultra_sun_route_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/94716720738.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/gta_5_lspdfr_calloutsv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/74715212025.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_off0000684f.bin
e320ac907fe642eca785253a28151df4ad3e914c6b97331f5076b7b9ecde3cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 5900 bytes
font_01_sfnt_off00007c67.bin
ed906f86d7bb456d5420200f0ccc5fb78ca3e52e0b0c697c17078e6e2bf9c494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C67 10156 bytes

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