PDF malware analysis — malicious · 67f347cdf8da0a26

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 05:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 528cd30ba42f3c25e26ed56ceae620d0 SHA-1: b043fa33eb22a3db3935ca5501cd073f037c08bf SHA-256: 67f347cdf8da0a26b606558bdc8f48b441b080d0048156defd18f97d0c56bcbb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and a list of other PDF links, suggesting a link farm designed to obscure malicious activity. The ML classifier also strongly indicated maliciousness.

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=stella+cottrell+critical+thinking+skills
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e4bc37_cf39d47c23134ad8be8cff6c2d81c50b.pdf
- https://static.usrfiles.com/ugd/de3d83_1984c185af144419bc054aa195c5cc38.pdf
- https://static.usrfiles.com/ugd/362633_7943411bd42747a79ca6377535f9d931.pdf
- https://cdn.shopify.com/s/files/1/0433/3623/7206/files/new_krishna_bhajan_ringtone_free.pdf
- https://static.usrfiles.com/ugd/b8c837_fcbed99362e3420ea838c0c4bbed583e.pdf
- https://static.usrfiles.com/ugd/e2f197_b7071bd6edf84d2b9196170956eb85fd.pdf
- https://static.usrfiles.com/ugd/3aee12_51b88622e8c044829df8a9d99d2fb2b7.pdf
- https://static.usrfiles.com/ugd/c836c3_85493170a0b3400ca2a7fa273ddf71e7.pdf
- https://static.usrfiles.com/ugd/b8c837_a6ca1f5a16b04905a656077c5c3cbf9c.pdf
- https://static.usrfiles.com/ugd/b8c837_237d3ab74ea845c88c79e92779e2444f.pdf
- https://static.usrfiles.com/ugd/dc98cc_e703d8f501de4f659828c15233cad93c.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_off00005e5b.bin` `1d72108cbd68146de554ec95c14edd5a0017e16de3888390e5a3cb6ba498217f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E5B	5228 bytes
`font_01_sfnt_off00007010.bin` `763f5fdba7f8ac1cd7732cec50071978d951142c470217c0769888fea68254b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7010	9984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.