Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee559973f10a398…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 02:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4b9e104e30ead8970119ee741e904e SHA-1: 8b1a7f6398dbbed590448f8561f02fa20c1f3e9c SHA-256: 1ee559973f10a398e981cf68afb00de50d7ebf0355ab75f42d176437157210ff
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a 'beauty camera free app'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The PDF also contains a large number of links to external PDFs hosted on Shopify, likely part of an SEO link farm to obscure the malicious redirector. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.ru/pify?keyword=beauty+camera+free++app
    • http://tizuge.custommadewoodproducts.com/uploads/1/3/0/9/130969060/vuxamasog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/80323265034.pdf
    • https://cdn.shopify.com/s/files/1/0450/3542/1846/files/amino_acid_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/lorilolixulirasu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/56417044685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/macroeconomics_mcconnell_19th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/pirates_of_the_caribbean_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/sirabadofudujofovosun.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/22113390205.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/gisuzepifipexobi.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_off00005dd8.bin
2d25f9a61cc76095ab0e7c749d2b19f05c78bc0151c7c84fe2f498f5f3a33582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 5100 bytes
font_01_sfnt_off00006f25.bin
62a105126da7fd28e685c488b22a3537a3016b2205c8e518e6cd2e0565e64a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F25 10352 bytes

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