Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1051cac6bae1b0…

MALICIOUS

PDF

82.4 KB Created: 2020-09-21 22:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 230f649d93ec39fa6feca1867bca627e SHA-1: 1aa84e504e6caf1fc6306f026d0d170fa9e1b5f6 SHA-256: ce1051cac6bae1b000529633b2ddf33d3d370ce79a3ed5430a4224ec9cd549a4
154 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 'https://ttraff.cc/wix?keyword=what+are+the+three+causes+of+imperialism'. This link is embedded within the document's body, suggesting a social engineering lure. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are to benign Shopify domains, but the primary redirector is malicious. 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/wix?keyword=what+are+the+three+causes+of+imperialism
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/zubotipepana.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/90462496913.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/formal_letter_example_job.pdf
    • https://4ffc8b49-709d-4752-9875-aa6f28b7bc1c.filesusr.com/ugd/d17951_8039071be9a840bd9cb4880898a2d35d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/23398871935.pdf
    • https://cdn.shopify.com/s/files/1/0461/7161/9491/files/21462867042.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/kreg_pocket_hole_jig_manual.pdf
    • https://ee89f988-af9d-4d77-b983-3a931260e130.filesusr.com/ugd/7f5dc5_34bfd694319e4d09ae5a9a4361e078de.pdf?index=true
    • https://efcffbb5-6e0d-4634-a9df-1b6f61b70ac4.filesusr.com/ugd/38062a_2b01815e62f54cdd9cacfc82190e61b0.pdf?index=true
    • https://2c5b43d5-71ed-4637-a5c4-8bb914b7822f.filesusr.com/ugd/115d6e_372a252eb6694c0dbfb425c51e6b1ef1.pdf?index=true
    • https://5d229ab0-f5f1-46e7-a14d-d5b8e6c943cd.filesusr.com/ugd/5b5da7_489f8b759db648e089404218cbb0129c.pdf?index=true
    • 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_off00010679.bin
e82760ec64f0fdbef7b2ccf1b461cd5cdf18b1c27cd66120e961a4f13a85abb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 5268 bytes
font_01_sfnt_off00011847.bin
986f502644238381522a97b9448b2f56699edb7f8dbd753afc7493d5942a0847
pdf-font-stream PDF embedded font (sfnt) at offset 0x11847 10576 bytes