Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61c6b7b280f9b7c…

MALICIOUS

PDF

53.3 KB Created: 2020-08-12 12:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0bd31142a806f8dff347f45b82c3a6 SHA-1: 86d2ba705b0c69945241509109549dc0aeb750c7 SHA-256: d61c6b7b280f9b7c162d5b4ae1b63a9b7cd806d0b88bb4e9d31016e845a4b13e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=bcc+fcc+hcp+pdf. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. These factors suggest the document's primary purpose is to lure users to malicious sites.

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=bcc+fcc+hcp+pdf
    • http://files.longbeachcoastalchallenge.com/uploads/1/3/1/6/131637357/mozapizur_paperaje.pdf
    • http://files.ednadach.com/uploads/1/3/0/9/130969306/zenipedatotu.pdf
    • http://files.vietnamunitedfc.org/uploads/1/3/0/9/130969710/somujasetig.pdf
    • http://files.ironantlerforge.com/uploads/1/3/0/8/130815026/demisuzumulelabosis.pdf
    • http://vuweruv.thorntonheathcricket.co.uk/uploads/1/3/0/8/130814017/xomejiroj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/49429368330.pdf
    • https://cdn.shopify.com/s/files/1/0436/2400/5794/files/xedoturofulupukibu.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/bobcat_753_service_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/13250004602.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/99195742845.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/96790544363.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/pafewozuluverajutewujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/tojeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/naraxopugotufulomuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/buwiwudodanet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/kimosovida.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_off000072f0.bin
494acc3855595812d7fff8e288eebe5000537159079d2a2423951b41bacde195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 4776 bytes
font_01_sfnt_off00008330.bin
3ea8736f21826b89ddbc805c87f17775dc88058c7919c75b0c98d15646474b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8330 15048 bytes
font_02_sfnt_off0000b32d.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 16060 bytes

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