Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a789c154589383…

MALICIOUS

PDF

51.2 KB Created: 2020-08-18 18:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 386c6b2377d61b3e5c8c1fdca34e3ce6 SHA-1: a80f72e8e69961362e390fe0144e4734779154b7 SHA-256: 93a789c154589383c4cc47c1c6a54dcf9891914dc607e9e4269d1bcd60c8dcaf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=define+clinical+practice+guidelines'. This URL is likely intended to redirect the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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=define+clinical+practice+guidelines
    • http://ronetevi.lingsgardenstore.com/uploads/1/3/1/4/131452861/3335259.pdf
    • http://files.rockhollowwoods.org/uploads/1/3/1/3/131398094/jofosi.pdf
    • http://files.wicksteadhorseplay.co.uk/uploads/1/3/0/8/130874284/6d9bea8a881902.pdf
    • http://buvodejux.craftingcompass.com/uploads/1/3/2/6/132683459/morixoxa_zagatedafidilap_gipox.pdf
    • http://kemug.rchsbands.net/uploads/1/3/2/3/132302978/4442547.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/17457206907.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/zaririmotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/tibesibokemeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/17989124018.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/zowimizefulumevurejore.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/gefovasafapizamiselewaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/fender_acoustasonic_15_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/77877757176.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/benim_hocam_matematik_dgs.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/toyota_tacoma_maintenance_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/kamofofekanofozuwexanaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/xubigufinubet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/folusegapomos.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_off00008618.bin
1d19bd5ec60c40fe9f70781dda8a1afeecfd883124f484601fbfb2e92be07e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 5320 bytes
font_01_sfnt_off00009840.bin
b6db359360532b4b849dbdcc4a0e345f564783f49ad30cb2333d95210b7f8bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9840 12352 bytes

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