Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e51f6aeaa6a4fdd…

MALICIOUS

PDF

33.4 KB Created: 2020-08-23 04:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa352079efaa2ed20ac3c785f3e013e SHA-1: 9dc74617abdd787e091496a30277513569e4c17b SHA-256: 0e51f6aeaa6a4fddbb939f0441f9a4b5d1d686e45a19ed348889c3f3675af733
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial point of compromise. The document body itself contains garbled text but also includes the malicious redirector URL and several Shopify URLs, suggesting a link farm or SEO poisoning tactic to drive traffic 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.cc/pify?keyword=chunky+heel+sandals+platform
    • http://files.boxerboogiefun.com/uploads/1/3/1/3/131379035/2324961.pdf
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://files.fatimaelizabethphrontistery.co.uk/uploads/1/3/1/1/131164425/6960264.pdf
    • http://files.whitecoatantidote.org/uploads/1/3/1/0/131070604/tupamumizixow_jexuvij_xoromodatowuwe_xawetoneg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/simovazubimedapilazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/lonubakite.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/saresinixagupulelesiderom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/26218543762.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/blowfish_algorithm_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/jewimu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/scared_to_be_lonely_piano_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/wubopavizenimefoliredigop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/sowunovurasasolukajosum.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/josogim.pdf
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/72332600942.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/melan.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/71095798121.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/xowebawikakefo.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_off000047f3.bin
9b9d89cd604107b9c2b59da7eb775e60e745a8948c0ee2d1f2d5871dce733147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F3 5352 bytes
font_01_sfnt_off00005a02.bin
f94129a2753526e2aeb8fbdd614ad6dd59be71a9771116474a122ea37431e7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A02 9072 bytes

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