Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a7eb90a839e2e2…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 16:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae86e9f19e4c4cec303d55633fa33f3a SHA-1: 1a89307c8f8c61c41890fbaf0e4074d0071bd429 SHA-256: 67a7eb90a839e2e2d070c6d3557b884f6422fcd0787bc0c0f5c9e97960964edc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to what appears to be SEO link farm infrastructure. One prominent link, 'https://ttraff.cc/pify?keyword=landscape+in+architecture+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs, suggesting a lure to external malicious content.

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=landscape+in+architecture+pdf
    • http://files.greatbooksgreatdeals.com/uploads/1/3/0/7/130740571/fujojaw_nirotagewebutoz.pdf
    • http://fifelarik.stories4strength.org/uploads/1/3/0/7/130776257/d5e44427336.pdf
    • http://files.luxtan.lu/uploads/1/3/0/7/130775228/vijadoxako.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/29374977704.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/marketing_consultant_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/wonigepuxosesejukatode.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/77569381217.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/wide_text_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/61267013773.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/gadunalaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/patafurixunaxivodexek.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/nagogimaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/11121709963.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/lutobepadike.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/kioni_remote_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/xozivawewekob.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/15598887874.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_off00006956.bin
e4ceef36dbee08b7667ce73ddbf117adeb79d6dfe0a9ce7be4abb7699b8662c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6956 5152 bytes
font_01_sfnt_off00007ae4.bin
10031d3832506e3a48bc01496201cde85be89509521c2afa56a7c41fcebb1f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 10368 bytes

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