PDF malware analysis — malicious · 1682ccbeea26376b

MALICIOUS

PDF

39.7 KB Created: 2020-09-03 05:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 76dea24abb5efeac7a19e9b2e7d66d0d SHA-1: 089a2f20d8fa88a982b62fbc926f2509aa8f97a4 SHA-256: 1682ccbeea26376b6665f636f958eb24d8e7cdeeca84a3b9fe979af9a7e95bd5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many of which point to external PDF documents. One URL, 'https://ttraff.club/wix?keyword=barbell+row+from+floor+form', is flagged as a known malicious redirector. The presence of numerous links suggests an attempt at SEO manipulation or potentially hosting malicious content, aligning with a phishing or spam campaign.

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.club/wix?keyword=barbell+row+from+floor+form
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/affb4a_aeb2207e5c4849d6b496bfaab894191c.pdf
- https://static.usrfiles.com/ugd/cece23_bf1a956f2037412c8393142930db705e.pdf
- https://static.usrfiles.com/ugd/76de1a_b13fb379949243638cca7cdf0b33ee9e.pdf
- https://static.usrfiles.com/ugd/b58d21_5d7a73144cc842e7a99a8a28e43becf4.pdf
- https://static.usrfiles.com/ugd/a6e5e9_6f24b58dfc704fdcb92a2804bc9f618e.pdf
- https://cdn.shopify.com/s/files/1/0434/1393/0142/files/37717329118.pdf
- https://cdn.shopify.com/s/files/1/0456/5244/3303/files/delta_sigma_theta_scoring_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/8102/3140/files/bank_loan_proposal_sample.pdf
- https://cdn.shopify.com/s/files/1/0430/6829/3287/files/36285125229.pdf
- https://static.usrfiles.com/ugd/a72fa8_6bdefdbce88543da9aa3e364597239fb.pdf
- https://static.usrfiles.com/ugd/b7082a_5e45f8e565cc494abf4be0f5a940ed96.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005fba.bin` `a958db8b34c9fc11e1c6cc2d68a03a3b6b6391d43db636adf8cff60e1bab7752`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FBA	5016 bytes
`font_01_sfnt_off000070cb.bin` `9ce3a36a6cc35cb5cafd784dce0e9acfcdc814a3e3ff9abb4055fd0a5aa5cc42`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70CB	9924 bytes

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