Malicious PDF — malware analysis report

Static analysis result for SHA-256 64112a5c320e000a…

MALICIOUS

PDF

53.7 KB Created: 2020-09-02 14:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51651e1d42ab9e30c558fca8e46273f8 SHA-1: ba8df1bd1d00dfe53e89070dcf1655b39ccceeae SHA-256: 64112a5c320e000a341dc62da647cdfb12e1e90ef2549845eff81f5ecb873fc1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.me/wix?keyword=autodesk+inventor+2015', is identified as a malicious redirector. This suggests the document is designed to lead users to potentially harmful content, likely a phishing or malware distribution site, under the guise of software downloads.

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.me/wix?keyword=autodesk+inventor+2015
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c207b765a0f34def87e54e84cc07233c.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_046bbe880ae94bbba8c1208b658a585d.pdf
    • https://static.usrfiles.com/ugd/82e28d_85edd3cb241b4e36b4707dd7bcb80168.pdf
    • https://static.usrfiles.com/ugd/ac72e0_b9adfc93ce8142fb9cdfbf1289fdadfa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jozibogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/avs_video_editor_gratis_full.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe4bb5b60d44115a28d07a42d7f2c23.pdf
    • https://static.usrfiles.com/ugd/6cfc61_7ca647442d694888b524bbc6795d10f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ca9236a8cce4246a9ea33e387d48a58.pdf
    • https://static.usrfiles.com/ugd/83b1b3_e1acc616816f4861abf29a2af94131fb.pdf
    • https://static.usrfiles.com/ugd/96564c_4986bb7cf2f642f387975d2727b48136.pdf
    • https://static.usrfiles.com/ugd/4826f5_ca1fb9d8a75b4533a2bdefc0145574e5.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675e.bin
191ec8c6894a100b4603f18c7ef5eae98bef8d3dcfaa91d0bd98be4aa091a59b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 5588 bytes
font_01_sfnt_off00007aeb.bin
8c0c4c9639ae493c2c1021589b90215708903a6b0c57922b0f7489764f66d046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 5140 bytes
font_02_sfnt_off00008c93.bin
61bdd483fa709bbed8c5522bf8c83fd1e0051538e625cb213690d45719c6b66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 11352 bytes
font_03_sfnt_off0000b2d0.bin
5054759e749bb734e938049909294a60eaad07ab0164109f83ab043c3dba66fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 16184 bytes

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