PDF malware analysis — malicious · 9276287b9daeb9bc

MALICIOUS

PDF

39.9 KB Created: 2020-10-15 21:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 01a4b33e3c40c73da68b953886a3ae30 SHA-1: 3468896c91129cb62e5c04eab47d5cba35ae9b27 SHA-256: 9276287b9daeb9bca910a6e2c78cd65afacfb2dba79ea796ce686ae1c013850a

124 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=fake+degree+certificate+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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=fake+degree+certificate+pdf In PDF document text
- https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/monujetepagelekakax.pdfIn PDF document text
- https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/9063337.pdfIn PDF document text
- https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/zegagoragek_nepumudusoku_woguxasar.pdfIn PDF document text
- https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/mosibebatepaxiv_sumuxujagapib.pdfIn PDF document text
- https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/fb60bc7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366374/normal_5f875481d479f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370541/normal_5f88950eb5e1a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369797/normal_5f8811ae171d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366952/normal_5f874d085bc0c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369793/normal_5f884d4321b81.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365601/normal_5f87622ceb54a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366668/normal_5f8861394bf44.pdfIn PDF document text
- https://site-1038555.mozfiles.com/files/1038555/50256939413.pdfIn PDF document text
- https://site-1041282.mozfiles.com/files/1041282/precipitation_hardening_steel.pdfIn PDF document text
- https://site-1040297.mozfiles.com/files/1040297/23612493406.pdfIn PDF document text
- https://site-1039414.mozfiles.com/files/1039414/simal.pdfIn PDF document text
- https://site-1048568.mozfiles.com/files/1048568/jixes.pdfIn PDF document text
- https://site-1048226.mozfiles.com/files/1048226/safejesopo.pdfIn PDF document text
- https://site-1048206.mozfiles.com/files/1048206/zuwenulifarepiziwalin.pdfIn PDF document text
- https://site-1041483.mozfiles.com/files/1041483/29907092168.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/1/0493/1734/7489/files/what_are_the_characteristics_of_greek_theater.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/0601/6674/files/dewalt_dc720_parts.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/3592/1064/files/personality_classic_theories_and_modern_research_4th_edition.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_off00005410.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5410	4704 bytes
SHA-256: `59087b43643aacd559c5df6f0115ac865b06b3866097fd005353fcb5980accf3`
`font_01_sfnt_off0000642c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x642C	9296 bytes
SHA-256: `55556d7694886dd66d4b3a8008b44a3e915851906e15b7480ff965d3b7df526e`
`font_02_sfnt_off000083c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83C6	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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