PDF malware analysis — malicious · 03993f742523cf47

MALICIOUS

PDF

34.4 KB Created: 2020-09-08 06:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 340bc04b737aed2418da9f9e4d30dac7 SHA-1: f46ad7cc38a2c6dd9dd6f6d4721be207d515bcc1 SHA-256: 03993f742523cf4741b93e7382602ed1ccb4b3f061ad0a3ae8a5541101e079db

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that are identified as malicious redirectors, specifically pointing to 'ttraff.me'. The document body, though partially corrupted, contains text suggesting it is an 'Astley park school ofsted report', which is a common lure for phishing or malicious redirection. The presence of numerous external PDF links, many of which are benign, suggests a link farm tactic to obscure the malicious destination.

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=astley+park+school+ofsted+report
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/111c46_660696893e584dab804a0e20d0a4a294.pdf
- https://static.usrfiles.com/ugd/54dfea_68b464e729cc439ea03a162528e1a453.pdf
- https://static.usrfiles.com/ugd/b8c837_9e1e337cd6fd4260911a757f1980cbd0.pdf
- https://static.usrfiles.com/ugd/a51aec_c4a8cb12bb7342fa929b1ebc6ad3e34f.pdf
- https://static.usrfiles.com/ugd/4329d7_135a97905c6a48eb8b97d763c7cf2041.pdf
- https://static.usrfiles.com/ugd/f64db8_a63ed6ea54514358a631f14514957f4c.pdf
- https://static.usrfiles.com/ugd/8f6098_99803134dfa04beb9886870ed133d634.pdf
- https://cdn.shopify.com/s/files/1/0432/7256/8996/files/accounting_basics_definitions.pdf
- https://cdn.shopify.com/s/files/1/0428/8774/1599/files/32147394640.pdf
- https://cdn.shopify.com/s/files/1/0445/8224/0420/files/51678156516.pdf
- https://cdn.shopify.com/s/files/1/0431/7498/5885/files/pamemigoturemelad.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_off0000461d.bin` `9f47afa964a460f4c8a76c593264c57ab0bcec8476e408b511b0ca104a694335`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x461D	5396 bytes
`font_01_sfnt_off0000587e.bin` `069cf9b082f02dc71c6161b605e22fba68b5fa3d46fa60d8041ab8cac6d8c633`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x587E	10680 bytes

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