PDF malware analysis — malicious · 70bb95beef389a75

MALICIOUS

PDF

38.9 KB Created: 2020-09-04 09:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 239ad8e9998917ca8148caedfbff0c8e SHA-1: 0c92fc1aa1373b917bbc957ba4bb2d9c80ecb596 SHA-256: 70bb95beef389a754a45cd76e31da2c72e2ac92cc767f3515b0e040cc6464c77

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector. The presence of numerous external PDF links also suggests a link farm, a common tactic for SEO manipulation or distributing malicious content.

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/pify?keyword=informal+discussion+at+work+template
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0457/6336/2980/files/lagu_gratis_di_iphone_5.pdf
- https://cdn.shopify.com/s/files/1/0430/8379/2548/files/ayurvedic_book_in_bengali.pdf
- https://cdn.shopify.com/s/files/1/0434/1510/9799/files/uc_browser_for_android_4._0.pdf
- https://cdn.shopify.com/s/files/1/0431/2943/8370/files/23155882492.pdf
- https://static.usrfiles.com/ugd/a421e3_14a4bf0497f74dd1b5ae25760a240432.pdf
- https://static.usrfiles.com/ugd/c618e9_25311d0dfa704f7386f1f492117df7f2.pdf
- https://static.usrfiles.com/ugd/963627_faa233ea59124b38bb67bfa06204fffd.pdf
- https://static.usrfiles.com/ugd/aff7ca_e4314719898a4bfcb8ed027c15c9b8d8.pdf
- https://cdn.shopify.com/s/files/1/0432/6319/7337/files/agricultural_engineering_formulas.pdf
- https://cdn.shopify.com/s/files/1/0429/4675/6774/files/muxedosemanuf.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_off000058ff.bin` `b069d44da109dcec92045db80b9fc73a81be3ad66fdbaf807bb7225c9de98886`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58FF	5392 bytes
`font_01_sfnt_off00006b5a.bin` `b0e4606c41419582de350351a38533fd3e700eb69bcfe46d378052b81b93e871`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B5A	10368 bytes

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