PDF malware analysis — malicious · 5aed291683a60329

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 18:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 65fe039523a77ea5563a6df748c364da SHA-1: 6fbe84839f866f81eeadc07653c5bfae79fc0a22 SHA-256: 5aed291683a60329b1693e9c9e8a541b97d48bbdd030d95c62bab2bd15997d21

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a "bell f12 bike computer manual pdf". The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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.cc/wix?keyword=bell+f12+bike+computer+manual+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static.usrfiles.com/ugd/b8c837_260a36ff4bd146d7914a3785e69143f1.pdf
- https://static.usrfiles.com/ugd/b8c837_da184cc2007d4a55b383342e8a576f75.pdf
- https://static.usrfiles.com/ugd/b8c837_a4e3ef6c714e46d79401bf9f7593084a.pdf
- https://static.usrfiles.com/ugd/b8c837_3c82afa7beb748dd8e9239a9b811b86e.pdf
- https://static.usrfiles.com/ugd/b8c837_60c32697e40e47429aa316643a28fa53.pdf
- https://static.usrfiles.com/ugd/b8c837_3419f3088ce24bba9636b245ef43c476.pdf
- https://static.usrfiles.com/ugd/b8c837_d00a1276db584a3a93ae5bebb2918050.pdf
- https://static.usrfiles.com/ugd/7598fa_03d0407bef6c48f8ac39803d0a7d3350.pdf
- https://static.usrfiles.com/ugd/b8c837_72c5ec11d5c444f1aa132617d50e0fc7.pdf
- https://static.usrfiles.com/ugd/b8c837_9e1e337cd6fd4260911a757f1980cbd0.pdf
- https://static.usrfiles.com/ugd/b8c837_856af25289c540668b00696f9757cb65.pdf
- https://static.usrfiles.com/ugd/b8c837_b2bdaabe6eac49cabe9427dcaf520c74.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e40.bin` `ae6a664b5120b00a7623fd928a9eeeca72ae85de9b1f06bcaedc3f75e0d0b341`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E40	5440 bytes
`font_01_sfnt_off000070a3.bin` `3081258a1f97eceedd4a08e9a5ffc32d585c6451229308351fe6b788cf902bc8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70A3	10160 bytes
`font_02_sfnt_off00009390.bin` `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9390	4324 bytes

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