Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee35b812a438a6e9…

MALICIOUS

PDF

40.1 KB Created: 2020-08-24 13:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22389728cd5ae86441f9b51f4b56e93 SHA-1: 92cfb2934c936b5289a4dcb6256813a4afcafdd4 SHA-256: ee35b812a438a6e9b5a863d59d52054c5a2dc5a2ea6d8549bc54bc94e0686142
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous PDF files hosted on Shopify, with one primary URL redirecting to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the ttraff.com URL is associated with malicious redirectors. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to download further content or visit a malicious site.

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=international+journal+of+biology+and+biotechnology+pdf
    • http://files.daviegaragedoornc.com/uploads/1/3/1/4/131437822/2306286.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5974/files/50106342259.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/20084901444.pdf
    • https://cdn.shopify.com/s/files/1/0449/3272/6952/files/80687761962.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/free_timeline_infographic_template_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/tisigavav.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/73384787011.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/sakigudafalafimesapig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/5495911370.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_off00005f28.bin
c521cc2c232903be9f20e86cf0cc15a2c78493a0acb84c3a19d98ec429112059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 5496 bytes
font_01_sfnt_off000071d2.bin
b48eaf5809981eff72a8d15496c22691d655f49a2d304056ce87748e0b92a70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 9880 bytes

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