Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eaa24380965e96…

MALICIOUS

PDF

42.2 KB Created: 2020-09-01 05:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7e57727ea9b4f9ab581ed68963e64b5 SHA-1: 1b57a3beb9302868ab24b174a3d835dc03138bbe SHA-256: c9eaa24380965e96a96ae183a3800b0420c43d1485e33da6c1f4ccbca768c963
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that lead to a redirector service, which is a common technique for distributing malware or phishing pages. The document body, though heavily obfuscated, contains text referencing 'passport renewal form canada youth' and a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness.

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=passport+renewal+form+canada+youth
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/instruments_of_the_orchestra_quiz_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/gewafemepudapute.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1589/files/86510000750.pdf
    • https://static.usrfiles.com/ugd/0dd040_b8086aa5fef446519aedc44b9df6c371.pdf
    • https://static.usrfiles.com/ugd/b8c837_250efd67a331445ab6d6eff729935873.pdf
    • https://static.usrfiles.com/ugd/b8c837_00a9562b2044405db30aef232bb75b87.pdf
    • https://static.usrfiles.com/ugd/3e9e83_c7e7f47f372e422ea38450b72c851f3b.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_11f5f549f73248e5b6fb5b1712bd7e01.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_97ae86a622e3450fbbd3be8b396e40bb.pdf
    • https://static.usrfiles.com/ugd/70c1f8_379da67c40d34859807b8edb9d92aa60.pdf
    • https://static.usrfiles.com/ugd/1c90dc_c69dc1af703e44d08fe4e091da8488c5.pdf
    • https://static.usrfiles.com/ugd/6a7407_f9c565de967a4856ab6b7ff23db933e4.pdf
    • https://static.usrfiles.com/ugd/8ab72e_35b1b59c2bf749e3b79f4bcef8d18d99.pdf
    • https://static.usrfiles.com/ugd/299074_19dc5b0e29ea4db99ac17938cac310ca.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_off0000658a.bin
2a6b2a837609d17f54fefd49012aa6996e24abfcbdacf03ad8478b5b1a75126b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 5592 bytes
font_01_sfnt_off0000787a.bin
bae86d8d743f13eb308dd416731fec72df4ee0275b9270086b450731dcd7ca13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787A 10364 bytes

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