PDF malware analysis — malicious · 02af252a933484f6

MALICIOUS

PDF

37.7 KB Created: 2020-08-29 18:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 17248eabf372b13bc8597281e669c4ad SHA-1: e30b41cec5a8920a7329985c04dd95ff129b5930 SHA-256: 02af252a933484f6a3c7c87012597f02a8eba1c9aebf1ccbd251ed4e6f13fb09

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are benign but likely serve to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL suggests an attempt to lead the user to a compromised or malicious site, potentially for further exploitation or phishing.

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/wix?keyword=panera+souffle+calories
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_6bcb1f5a65bf4a72a1e90f841602bdbd.pdf
- https://static.usrfiles.com/ugd/9cfd0a_ab29d2c6952347a39cea7413b68aff7b.pdf
- https://static.usrfiles.com/ugd/b8c837_360761792b164f5fbbfd65699e1d06c7.pdf
- https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
- https://cdn.shopify.com/s/files/1/0429/1470/9663/files/17432222315.pdf
- https://cdn.shopify.com/s/files/1/0430/4420/8797/files/86531052190.pdf
- https://cdn.shopify.com/s/files/1/0432/6011/7160/files/67478331010.pdf
- https://static.usrfiles.com/ugd/b8c837_034fe068f00c4feab4e6424493976977.pdf
- https://static.usrfiles.com/ugd/b8c837_949bcddcbd734bbcaf75a39819f57f67.pdf
- https://static.usrfiles.com/ugd/b8c837_a9006dcd00db4a1ba164894ddcfa0059.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_off00005896.bin` `749ae04142e9cf8a3866086c438b6b323a7e0d0f451e55519f8f3e0740df2081`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5896	4876 bytes
`font_01_sfnt_off00006931.bin` `f2672dcd51868494a43a5d3f02cf3a916896e7408e14f5adad86c62f817005f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6931	9740 bytes

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