Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0c1d09b0d9644e…

MALICIOUS

PDF

38.0 KB Created: 2020-08-13 12:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d149ddd1309755527c2121c765841048 SHA-1: 6fc6f089691039a3a5911420979e33e0ed48a7a0 SHA-256: ae0c1d09b0d9644ed7fddacb0f57da6dd67c2662b7c1e5a7a7b7b45994be9b50
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to funnel users to further malicious content. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt to mask the malicious destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious campaign.

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=boundary+wall+estimate+pdf
    • http://files.theblackribbonart.com/uploads/1/3/2/3/132303181/4f1c131.pdf
    • http://files.shulman-writer.com/uploads/1/3/0/7/130739970/a80e4c53c4.pdf
    • http://files.tahlequahtrails.org/uploads/1/3/1/4/131454286/vavarifinosi.pdf
    • http://tazizinub.mentororchestra.com/uploads/1/3/0/8/130873995/205254c.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • https://cdn.shopify.com/s/files/1/0436/2259/6768/files/xijisemumumufojileg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2825/files/accsap_8.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/25908270490.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/86454953323.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/vexigenotumadulowofebitef.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/pukonefirexasomawed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/piano_sheet_music_kpop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/slavery_in_america_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/foods_to_avoid_on_keto.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2097/files/78176770144.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/water_logging_and_salinity.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/aphasia_classification.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/mapa_turistico_amsterdam_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a2c.bin
2f9677de2916eb0f28e9bef68fc99758f50013786fb11095dac15dadeade19df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2C 5432 bytes
font_01_sfnt_off00005cad.bin
97cdb2cf661b6fca7803dfe72dbf0917bfca7fe5332061fa104058b91e32f48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAD 9576 bytes
font_02_sfnt_off00007daa.bin
ab0b30550c16f0218ea180a56450acc25083be48fb805cb0f6f475dfa13b8319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 2832 bytes

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