Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1442393b98a6d83…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 22:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234bbba5501bd190a2802f15db83f256 SHA-1: 74feadc4c03086f6e24cea68453eacf8269af637 SHA-256: a1442393b98a6d839b04155f63450a73b59a3a77607c1bba4cfaf030297b4790
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.me/wix?keyword=chicago+bears+colors+paint, is the primary indicator of malicious intent. The document body, though heavily obfuscated, appears to contain this URL, suggesting a social engineering lure to trick the user into visiting a malicious site. No scripts were extracted, and the file type is PDF, indicating a likely phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=chicago+bears+colors+paint
    • https://static.usrfiles.com/ugd/97634b_9a96e019a8764c1281265cf6c2d15c8f.pdf
    • https://static.usrfiles.com/ugd/158fb9_e6e1be5e5fb4414d8dfbcde0aab62d8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b141bc19f86a429baf8c81e42b40d6e9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/86491067329.pdf
    • https://cdn.shopify.com/s/files/1/0432/1473/3480/files/78471404683.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/gegexigibakefawesiw.pdf
    • https://cdn.shopify.com/s/files/1/0449/8790/8264/files/al_fajr_clock_ct-_01_manual.pdf
    • https://cdn.shopify.com/s/files/1/0459/0531/3946/files/52298385475.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/19615802202.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_off000059dd.bin
e2e6c2121b8820f62b46ecf7296066a368fe51b77a662257de56741dd83c6bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DD 5240 bytes
font_01_sfnt_off00006b9e.bin
3fd377e9e9a98e8e377cb61aca54bbd0f71bea4c60966cbeb6d139b3c58a511e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9E 11592 bytes

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