Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e9ee9d4379ec7d…

MALICIOUS

PDF

48.3 KB Created: 2020-07-30 22:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2272026cfa05f677e1b4baa09a86f65 SHA-1: 7d2035a4302c8a7291cc4f70be528714fb1cb703 SHA-256: a2e9ee9d4379ec7dd355ec9e50fe1b5f8f6b7a9074b4503062d1dd0d4a5fb627
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely intended to lure the user into clicking and being redirected to a malicious site, potentially for phishing or malware delivery.

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=algebraic+equations+word+problems+pdf
    • http://files.highlandroofingcontractors.co.uk/uploads/1/3/1/4/131406885/2879152.pdf
    • http://files.wallingfordmuseum.org.uk/uploads/1/3/1/1/131164567/nesop_niwote_gavapogafun.pdf
    • http://files.middleamericanmafia.com/uploads/1/3/1/3/131398452/xumesaxuxerebib.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/31026418255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/80500271122.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/todesasatiwupofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/3292336678.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/3495306982.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/60789936152.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/legipemumoxuboxupeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/giteveda.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/40820537711.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_off00007aa9.bin
08957ec07920e0d6739950577790469f671307dc76962bc37149bcf15ee666ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 5704 bytes
font_01_sfnt_off00008df7.bin
9f87ac9220cd399a94608767e48d554dcb0b629029921350092a581f77306919
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF7 11328 bytes