PDF malware analysis — malicious · 50679b57fb4dbdca

MALICIOUS

PDF

51.2 KB Created: 2020-10-27 01:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 1620abbac9cceb01db5264b319462856 SHA-1: c8151177571e1c629c3152907bff504e7deed3c2 SHA-256: 50679b57fb4dbdca26814579e388b6376a79dc3b41a57fb0ec09de99f18e7e2f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs, one of which, https://cctraff.ru/strik?keyword=allison+3000+transmission+codes, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or SEO poisoning tactic. 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://cctraff.ru/strik?keyword=allison+3000+transmission+codes In PDF document text
- https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/4727019.pdfIn PDF document text
- https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/jukefunesaxemew.pdfIn PDF document text
- https://mixorone.weebly.com/uploads/1/3/1/4/131438240/1ee4b70a4.pdfIn PDF document text
- https://viziwebaf.weebly.com/uploads/1/3/3/9/133999863/juwolepumajida.pdfIn PDF document text
- https://juporolo.weebly.com/uploads/1/3/1/3/131380745/717030.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jinabom/cgst_act.pdfIn PDF document text
- https://s3.amazonaws.com/vuforewebub/auto_electrician_job_description.pdfIn PDF document text
- https://s3.amazonaws.com/genedonapubefe/majagej.pdfIn PDF document text
- https://s3.amazonaws.com/jafujasiwetid/goxizedebedusonibutotabe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba24086e-263c-4ebd-92b2-37aeccb61ff7/rubowuta.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65b733be-d0d1-4bca-9a29-d1d8e3055b50/pobowupikevejizomub.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d36ce7c5-76b5-4765-a7ae-7cf743257fe6/93188545404.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04574071-c3db-436f-99ca-be5028299e03/62005100629.pdfIn PDF document text
- https://s3.amazonaws.com/tesodagiwor/13480354212.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/jijixorurisu.pdfIn PDF document text
- https://s3.amazonaws.com/jinabom/51687112154.pdfIn PDF document text
- https://s3.amazonaws.com/suzixegazunow/benifirepuzokivax.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/ncert_biology_class_10_in_hindi.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/15535025533.pdfIn PDF document text
- https://s3.amazonaws.com/dazifozixawus/comunismo_e_socialismo_em.pdfIn PDF document text
- https://s3.amazonaws.com/susopuzupure/puxipipusew.pdfIn PDF document text
- https://s3.amazonaws.com/gidibesuxi/amvisc_plus.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/ginisiguteput.pdfIn PDF document text
- https://s3.amazonaws.com/rubidokezive/77163953874.pdfIn PDF document text
- https://s3.amazonaws.com/subud/domumubutex.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F7B	5380 bytes
SHA-256: `031fa4bc1d1ac3d0c39878b3b77a7d8ce24e7dc5b4e817eac0c29a447eb778e0`
`font_01_sfnt_off00008194.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8194	11396 bytes
SHA-256: `f5b0e0e6c4fa003ba579b300c2972344983eb2c0e324d8536e8723a0160335d2`
`font_02_sfnt_off0000a87d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA87D	16092 bytes
SHA-256: `e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848`

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