PDF malware analysis — malicious · 83a93427a97220f3

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 01:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 87a5001e6108e7517d28892542a3ddf0 SHA-1: 03372c45525528c5a813385a4703b61f5f32afbb SHA-256: 83a93427a97220f37aa0e97b840be5924669891de85094e1bc275c5b18a4e9b4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs, particularly the ttraff.link domain, are suspicious and likely lead to further malicious content or phishing pages.

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.link/wix?keyword=livro+entende+o+que+l%25C3%25AAs
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/1f2646_46f9f7ef77364f3894145a07030fa84e.pdf
- https://static.usrfiles.com/ugd/b8c837_1d01076753b64e8cb95bf33bb589692f.pdf
- https://static.usrfiles.com/ugd/b8c837_3e9074e7aae7466ab2967f2a62113d21.pdf
- https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
- https://cdn.shopify.com/s/files/1/0429/7873/8335/files/dipagezanifele.pdf
- https://cdn.shopify.com/s/files/1/0429/5835/6639/files/80064840176.pdf
- https://static.usrfiles.com/ugd/b8c837_b684c3bbe04f4812baeb904e999776ef.pdf
- https://static.usrfiles.com/ugd/b8c837_b6749ae73bce4fd8b2c312012ea23b8c.pdf
- https://static.usrfiles.com/ugd/10e3af_663f18070b9c458ba676b897f5175619.pdf
- https://static.usrfiles.com/ugd/756799_0e71fe84fca54fe1bbe06f943b399b7c.pdf
- https://static.usrfiles.com/ugd/b8c837_0666e95256234955a04ebe5362be9d6f.pdf
- https://static.usrfiles.com/ugd/ade4e6_1e770b4a1f1949cd81dc981dba71f338.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_off00005117.bin` `fee39821c191b7b48b8d6975e410aeaf323595162b7db142acbbe5a2f43532f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5117	4884 bytes
`font_01_sfnt_off00006183.bin` `fcfc722e77689eb2afb63944d30578d07c5b8a93d6987a9b3491fdc50e12d369`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6183	13812 bytes

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