Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bedabc2ce0bee9…

MALICIOUS

PDF

47.0 KB Created: 2020-08-04 22:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ed851dfb6f5e529f0ee322e2d958ee SHA-1: 149e9df277ed55448393deb89e34a3bf6d83b880 SHA-256: 01bedabc2ce0bee910397aaa03ff55b5a7313d835e82c5f1cf3ffcbbec2f96b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.002 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve SEO and disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=regime+de+capitaliza%25C3%25A7%25C3%25A3o+simples+pdf
    • http://files.letspaintarabic.com/uploads/1/3/1/3/131379612/22ab9b14a11.pdf
    • http://files.loneoakcoffee.com/uploads/1/3/1/3/131398504/a0624ece1b56624.pdf
    • http://files.preecelightning.com/uploads/1/3/0/7/130775462/5586088.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/30967142060.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/rsf_pool_hours.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/7_dwarf_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/notavowakamodixoxonexuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/20854921985.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/dotuxemepof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/total_language_plus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/fasijewopozenonore.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/sitedotarebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/jovaverenofikarab.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/70604801743.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/10891140811.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/47940474273.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_off00007209.bin
59fb96aae16040a657f67baeaf90f64b6dde50c27de1c5cc8664ff5d26c7d311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 5936 bytes
font_01_sfnt_off00008568.bin
e772cb0f1e9b1321ee19250c3797cabe00f455ecfc314b40ca1b6838703c45ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8568 12804 bytes

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