PDF malware analysis — malicious · 07be91bc0e3877a1

MALICIOUS

PDF

36.6 KB Created: 2020-09-02 05:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 83aa3679c0a0a8b843e1e9edcd462f04 SHA-1: edab6887825ce3e10efa33f1a460d21db376ddf6 SHA-256: 07be91bc0e3877a1c32318bc391f0c4030ab38c5537aeabeca080624d005a5a8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a link farm heuristic further suggests malicious intent to drive traffic to external sites. The ML classifier strongly indicates 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.com/wix?keyword=abhishekam+movie+songs
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/91e123_1d24dcd292264e2ab399a752a051e15c.pdf
- https://static.usrfiles.com/ugd/314c35_554c5cf3af7a4b2aa7936e00709a815f.pdf
- https://static.usrfiles.com/ugd/04e6f9_3a19a45b403f4fa0a1ae965eea5fa3be.pdf
- https://static.usrfiles.com/ugd/fbccce_7f2fdb0d64bf442ea38978276141b1c3.pdf
- https://static.usrfiles.com/ugd/6260fe_d26bc329278148d592ce6d8b86852833.pdf
- https://static.usrfiles.com/ugd/008e52_e93657832e4c47a793400f4f20a99dc7.pdf
- https://static.usrfiles.com/ugd/e2c250_cb4612cedb8d4e5fa2b949956c8d7b09.pdf
- https://static.usrfiles.com/ugd/cfa91a_d68c3c4a6ff64cff8932bede51e54f51.pdf
- https://cdn.shopify.com/s/files/1/0433/3164/9689/files/zipidedusamavugoweweresu.pdf
- https://cdn.shopify.com/s/files/1/0432/2715/2539/files/44543636205.pdf
- https://cdn.shopify.com/s/files/1/0433/2571/8678/files/miller_trailblazer_302_manual.pdf
- https://cdn.shopify.com/s/files/1/0434/5430/0312/files/jibowilujivujewadosodij.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_off000051e1.bin` `bc58cac263727ce4f2de8b1f90c671ea7c03061a390d014dc9acad3a350640df`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x51E1	5224 bytes
`font_01_sfnt_off00006390.bin` `6f7fab26b4d5ddc0f6ae1eb33d65384c9490707c9826406041bb76bb28bc38d7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6390	10064 bytes

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