Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4764048da32176…

MALICIOUS

PDF

45.6 KB Created: 2020-07-29 14:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf26ed88bf6b5fe8a0252a14dff7da72 SHA-1: 98cf49ad97ffe4cc71fef149d73f594c0c01ce54 SHA-256: 7c4764048da321760459d840c9014ffe6c50c6f44158a4364e0d8628157d539a
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 external websites designed to redirect users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.com, a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'business analysis tools and techniques'.

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.com/pify?keyword=advanced+business+analysis+tools+and+techniques+pdf
    • http://files.maninithoughts.com/uploads/1/3/1/6/131607093/koxesidipegor_wolaxobadeletul_lezijix.pdf
    • http://files.eapedagogy.com/uploads/1/3/0/7/130776644/vavuzakalopanutarem.pdf
    • http://files.averydennisoncloud.com/uploads/1/3/0/8/130813550/1c1a8beb.pdf
    • http://files.craftyfoxx.com/uploads/1/3/1/4/131483685/6a2874f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/sexirasem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/sagurexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/riwazodexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/sodaneboketesenan.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/vegexeduguvasukumuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/gawis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/gowimixavesozonakowudibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/zimalalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/45863131653.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/gogam.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_off000074d8.bin
aa0184d60d41990e93866c5c4abfcab4db4ba93cd4a505bed4fbcac938225536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 5444 bytes
font_01_sfnt_off0000875d.bin
c86c2f0974f82ef7a4d8fb59fcbe8127c7728b0733e36217d4835f41cc7d5b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 9744 bytes

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