Malicious PDF — malware analysis report

Static analysis result for SHA-256 641519a7ee3aef16…

MALICIOUS

PDF

53.1 KB Created: 2020-08-15 03:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 111e877f28568add61c1d7feb2dcd08c SHA-1: 18f3c4d5565b60ca177b6fdddad969185aab1ee9 SHA-256: 641519a7ee3aef163e7310af1eb6f60c8662b89d106118aaf22299e0376c07ec
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a redirector link to 'ttraff.cc' and a high number of external PDF links. The ML classifier also strongly flagged this document. The embedded URL points to a known malicious redirector, which is likely intended to lead the user to a phishing or exploit page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/wb?keyword=stations%20of%20the%20cross%20catholic%20pdf
    • http://files.lulabellestyle.com/uploads/1/3/2/6/132681632/645d9215fa930.pdf
    • http://files.luminoushealingtouch.com/uploads/1/3/1/4/131454771/7755939.pdf
    • http://files.brokercontracting.com/uploads/1/3/1/0/131071137/niwolakap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/dulan.pdf
    • https://cdn.shopify.com/s/files/1/0443/0174/6332/files/vuwavaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/gorikoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/lalugadodufafolas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/tuwoxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/92501016899.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/53781188141.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/44029051316.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6966/files/sasopaduviwaxafip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/principles_of_fraud_examination_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/bivuwujipikoxojixasegizox.pdf
    • https://cdn.shopify.com/s/files/1/0437/8433/9613/files/defujupuxeram.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/invincibility_cheat_gta_5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084b6.bin
e80b20596433352df450338c2675503a795d77f4d4312aea562b7fed7a875d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B6 5132 bytes
font_01_sfnt_off0000960b.bin
1965940f68f94f390ae8061b8ef340c33d139ad08eb40f29087b7ca78f44b670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 10144 bytes
font_02_sfnt_off0000b8cb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CB 4324 bytes

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