Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ede7d94b89a90c3…

MALICIOUS

PDF

75.3 KB Created: 2020-07-28 07:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7a075b5e60b22854155e48c20d494a4 SHA-1: 3348a65f9dafe84d731656ba1c0b799479b188c1 SHA-256: 0ede7d94b89a90c36912080f6750313845339d64f8de7cc3aa1e552d1ba81570
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword relevant to technical content. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to other PDFs, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=waveguide+directional+coupler
    • http://files.americancatalyst.org/uploads/1/3/1/4/131452824/pijabiraworufoji.pdf
    • http://files.cjstuf.org/uploads/1/3/0/8/130873718/goluzenew_rokugi.pdf
    • http://files.rrtackstore.com/uploads/1/3/1/8/131871467/womage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/18010808495.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/73452122453.pdf
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/terutirijatugoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/jepebezajez.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/65939699193.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3419/files/rozireziwotumesedowoda.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/ralelewufuwuvodubor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6104/2591/files/ribibafizavorawovex.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/20342961980.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/wazeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/kanorozu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f3.bin
288c871ca3a6d1d9fad84ae917a994737638a4e23596955dac7a4458b7c7e88d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F3 5016 bytes
font_01_sfnt_off0000e720.bin
c3ae40ee12c0313e8f8615105c83cf507656949026e35a72a5505e000be3c697		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 10324 bytes
font_02_sfnt_off00010abc.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 16036 bytes

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