Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e52478e45954da9…

MALICIOUS

PDF

39.1 KB Created: 2020-08-26 17:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f294a5d01c10be09e5b97808520494 SHA-1: fedf15d973385be25680848b3be00e5a3551193c SHA-256: 7e52478e45954da9868c4561d787b15e69aed2c9126bdac6288edeea83b3fdc1
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=civilcad+gratis+para+autocad+2016, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to software downloads and URLs, suggesting a lure to trick users into clicking the malicious link. The presence of a password-protected archive lure heuristic further indicates an attempt to conceal a malicious payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=civilcad+gratis+para+autocad+2016
    • http://files.livingcreativebydesign.com/uploads/1/3/0/7/130775918/4299949.pdf
    • http://files.ashleyparsonsyoga.com/uploads/1/3/2/7/132740415/newixebomufobezofawe.pdf
    • http://vunejujat.jaimearon.com/uploads/1/3/1/4/131437940/6965771.pdf
    • http://xakide.simpsonchorus.com/uploads/1/3/2/6/132696067/2978f697de79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/60552404171.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0082/files/57518468457.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/jquery_clear_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/74064023022.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/lobowurusosunibovitagadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7509/9041/files/redowukuwuwefopew.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/zolubuzamaxino.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/gadabimipur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/7333126465.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055d5.bin
f240a3b32e939b511abcff83eb0b5e97011c37fa71f8d1b14e18e5f5acc63762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D5 5688 bytes
font_01_sfnt_off00006937.bin
8c317e75b65785c8ca0863cc7e7117212d8a9d6c65e6054dec05cc07d9066f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 11196 bytes

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