PDF malware analysis — malicious · 5f6c2b5a0569eb7a

MALICIOUS

PDF

39.6 KB Created: 2020-09-04 17:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d72d67aafc13403902afb8b0091f2c3d SHA-1: 4dcd73d1dbb6f024f4836cfa91bacdd6f726df9e SHA-256: 5f6c2b5a0569eb7a0909d5f17d3518b63f9c30e292edbc1ad763e5473d2eabd8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=njdot+complete+streets+guide
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/370ea2_ca2e86bc79b84d77a7947735dc1d2c07.pdf
- https://static.usrfiles.com/ugd/0dd040_4512944ebe554bc89debfaf58729aa71.pdf
- https://static.usrfiles.com/ugd/008e52_6267922f656841f6bd726a04c291250b.pdf
- https://static.usrfiles.com/ugd/e481ce_8bb282e596534480b438e6d37d656485.pdf
- https://static.usrfiles.com/ugd/9d7ad9_2c568404efad404aad6431ff39b16bcf.pdf
- https://cdn.shopify.com/s/files/1/0437/6782/4533/files/lanamoputup.pdf
- https://static.usrfiles.com/ugd/fe83c3_4bf29cca50d74e4584e90ca78c9711d1.pdf
- https://static.usrfiles.com/ugd/b8c837_6f6068acbefa42d9a9039bad35eae4bf.pdf
- https://static.usrfiles.com/ugd/b7306e_ca4e87af0f43471a9736fddb6b99b1bd.pdf
- https://static.usrfiles.com/ugd/027f51_f6351668d8724de88aa9cff54802ae59.pdf
- https://static.usrfiles.com/ugd/b58d21_e5446a556f744bf7a6db658dc47bda4c.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_off00005edf.bin` `341551385e5b9c5ab3a53d4e99350618fd477e0d066ecb785972802d48563fe6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EDF	5228 bytes
`font_01_sfnt_off0000709b.bin` `74647627c1145b0eb7a9985ddf7f1578cdb6d764149032d31fb9466d995d4fbc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x709B	9724 bytes

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