PDF malware analysis — malicious · d5ed1fff866bb6c2

MALICIOUS

PDF

115.8 KB Created: 2020-10-27 00:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 1ce9644aa24f4e52176d13ca33049df7 SHA-1: 963e9ab1e69431df6890c574e3d367ae9c188796 SHA-256: d5ed1fff866bb6c2a077e12881991517b45e6bc4b030ca6f07007e5aac59fa0a

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/123?keyword=flvs+spanish+2+2.04+answers'. Additionally, the PDF hosts a large number of external links, many of which are PDFs themselves, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The document body contains a URL that matches the malicious redirector, reinforcing the lure.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/123?keyword=flvs+spanish+2+2.04+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4379237/normal_5f8b7d02f0370.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385853/normal_5f92ef3ea30b4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367944/normal_5f92fe84c2c4f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377933/normal_5f8b6c0cd4d57.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369146/normal_5f964a570b4a0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375522/normal_5f8af5cfae9e4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381735/normal_5f8bbcd27528d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365525/normal_5f872da77eb8f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/054d931b-9ec3-4669-bcfd-9ba43064770e/25943340115.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff738e6b-ab3a-4a5a-aec1-e0e2b7a7b839/tovatojalagadofubid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94faf9ba-3040-4585-b53d-66ce114eb846/15930516053.pdfIn PDF document text
- https://s3.amazonaws.com/remufuzu/90207800990.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/zovone.pdfIn PDF document text
- https://s3.amazonaws.com/mudurixo/kuwoku.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/wenajigixotomobu.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/easy_friendship_bracelet_instructions.pdfIn PDF document text
- https://s3.amazonaws.com/lezopobigeza/ziduzomazimasel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/8608/4772/files/646435256.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/3055/6053/files/19357066927.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/1642/0009/files/manual_motorola_moto_e5_plus.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_off00016db1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16DB1	5408 bytes
SHA-256: `bff59f92634d948e717fd97b437727f096f8fc8c79978ce1571d9aaa6fd7a002`
`font_01_sfnt_off00018029.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18029	13716 bytes
SHA-256: `f53e6b54e963dc132cd3098b0b890efccaeb1a365b50b823ba76da2572e52645`
`font_02_sfnt_off0001ac94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AC94	16092 bytes
SHA-256: `39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67`

Open this report in the interactive analyzer, or submit your own file for analysis.