PDF malware analysis — malicious · ea4ab4d66d778069

MALICIOUS

PDF

40.1 KB Created: 2020-09-18 03:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c6b981caba877a353de1a4ca5f1ff479 SHA-1: aa81a880ade10ddafaa1a1356026ccf299d5d2b6 SHA-256: ea4ab4d66d778069a8e208f36df21193b6af3e775840ae23019287c31acd56cd

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO poisoning or redirection to malicious content through a link farm. No scripts were extracted, limiting the analysis of direct payload delivery or execution.

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=ions+formation+worksheet
- http://files.priorityoneinc.com/uploads/1/3/0/8/130813526/dikoxupumiji.pdf
- http://files.taiwanbeaches.com/uploads/1/3/1/0/131071114/rotupa.pdf
- http://towaxidem.oipelmiracorning.com/uploads/1/3/2/6/132683071/466988.pdf
- http://files.melbatheater.org/uploads/1/3/0/8/130813841/takigubi.pdf
- http://files.caymanpensionwatch.com/uploads/1/3/0/8/130814226/resiwetumomob_ferijafesafep.pdf
- http://files.restellsaroaming.com/uploads/1/3/1/3/131383825/vifakokunasita.pdf
- http://files.airprogerogia.com/uploads/1/3/0/9/130969475/zebusidejov-fawugaziwuna-fegop-juzok.pdf
- http://xibek.bonafidemealprep.com/uploads/1/3/1/1/131163507/kufiv.pdf
- http://temivokum.ycinvited.com/uploads/1/3/1/0/131070420/1372828.pdf
- http://fokuron.samsarahathayoga.com/uploads/1/3/0/7/130739069/wodatomaroware-nupulede.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
- https://cdn.shopify.com/s/files/1/0432/0732/7899/files/guitar_caged_system_print.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f21.bin` `a523344ce2fa78eae5047d988c984b067aa57ee40a0e49c46f40e2b66bda6e41`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F21	5068 bytes
`font_01_sfnt_off00007045.bin` `b110228cc382bb50df84e4a231126781758b40977f0a96df9376b896f6b199e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7045	10444 bytes

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