PDF malware analysis — malicious · 0538cb4297eb3809

MALICIOUS

PDF

38.5 KB Created: 2020-10-06 12:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 8313951836468a13b4d751d5d10f193d SHA-1: 50387ff292d01bf86eef0f78f60b359841432d87 SHA-256: 0538cb4297eb3809692ba255a9e7673e00d07556015929719d4f6f320df0a2c4

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically identifies a link to 'https://cctraff.ru/strik?keyword=mass+media+law+pember+pdf', indicating a high likelihood of malicious redirection. The ML classifier also strongly flagged this document as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://cctraff.ru/strik?keyword=mass+media+law+pember+pdf In PDF document text
- https://site-1038326.mozfiles.com/files/1038326/26359938397.pdfIn PDF document text
- https://site-1037141.mozfiles.com/files/1037141/42375067434.pdfIn PDF document text
- https://site-1036946.mozfiles.com/files/1036946/37285637355.pdfIn PDF document text
- https://site-1038414.mozfiles.com/files/1038414/vojakam.pdfIn PDF document text
- http://files.mohpg.org/uploads/1/3/1/3/131398250/1fd99f.pdfIn PDF document text
- http://files.proletariantraininggroup.com/uploads/1/3/1/4/131409090/2849660.pdfIn PDF document text
- http://files.pederistad.no/uploads/1/3/0/7/130775373/cecfd41fca.pdfIn PDF document text
- http://jekeje.gidannodza.net/uploads/1/3/1/3/131381886/ff933ab528cc04.pdfIn PDF document text
- http://files.personalprotectioncanines.com/uploads/1/3/1/6/131606923/7894920.pdfIn PDF document text
- https://site-1036786.mozfiles.com/files/1036786/zeroferefujarugaxogagin.pdfIn PDF document text
- https://site-1037219.mozfiles.com/files/1037219/wivisi.pdfIn PDF document text
- https://site-1041614.mozfiles.com/files/1041614/pumilabawokeputobur.pdfIn PDF document text
- https://site-1038774.mozfiles.com/files/1038774/54230285616.pdfIn PDF document text
- https://site-1043451.mozfiles.com/files/1043451/sisuwekowoteridexega.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0434/7353/5142/files/what_a_wonderful_world_sam_cooke.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4389/8019/files/monads_are_burritos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6752/3743/files/zadokor.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/3775/1453/files/16998438580.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/9953/2701/files/28809435919.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004bf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BF7	4916 bytes
SHA-256: `0d959cc7dab41f9921296b2a4494e41b2a9b222ab5a2a66c9697df7f112d746d`
`font_01_sfnt_off00005cae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CAE	10220 bytes
SHA-256: `a760a61e07f139aaa02ce0cc7cec421ea232fe708c9b1ef56ee72541d1507200`
`font_02_sfnt_off00007f19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F19	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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