PDF malware analysis — malicious · cf51866410a2ada9

MALICIOUS

PDF

95.6 KB Created: 2020-10-25 05:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 82ea1a2da80890a2fa72469b6037e6cd SHA-1: da924cc4e371c999c041bb3bad2d4b5b94f8bcef SHA-256: cf51866410a2ada9a165ad7e4e9fc92e8c14c154c994699152bfe0803f2ab2cf

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.me/123?keyword=epi+info+self+tutorial+manual+with+exercises'. The document body, though heavily obfuscated, contains text related to 'Epi info self tutorial manual', suggesting a lure to disguise the malicious intent. The presence of a large number of external links, many hosted on disposable domains, indicates a link farm designed to distribute traffic to potentially malicious sites.

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.
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://ttraff.me/123?keyword=epi+info+self+tutorial+manual+with+exercises In PDF document text
- https://cdn-cms.f-static.net/uploads/4368972/normal_5f90d68d81b02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372721/normal_5f8e6d3a6184b.pdfIn PDF document text
- https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/2202578.pdfIn PDF document text
- https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/eb7888.pdfIn PDF document text
- https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/rukoj.pdfIn PDF document text
- https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/5011048.pdfIn PDF document text
- https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/468684.pdfIn PDF document text
- https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/famedanebeleru_fejoxuwapirivo_lerazedem_saxenugiwobirav.pdfIn PDF document text
- https://tovalowu.weebly.com/uploads/1/3/4/3/134375552/5143201.pdfIn PDF document text
- https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/tamegonufugak.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/pazovugal/97985989931.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/bifie_mathematik_aufgaben.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/gonasiforimazavevutodijij.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5f6e01e9-2cac-476b-91ce-f68a9b661f6e/23311612435.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ddce4b33-7f5e-4fd0-a52d-bc41d5abc246/minecraft_full_indir_bedava.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/990f14c6-d046-4dfe-b315-a99daeb43d77/vojixuputevatiweseroxi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c0296910-97a3-4a58-8643-d2fba792f5be/family_feud_questions_and_answers_20.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d44d8c9-54a9-483c-90cf-b05d2bfe9470/84986409376.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2fe12f89-8cbe-4f47-bfa3-522c06ad0d63/9982060920.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c7323009-5632-4f7d-955a-d682e77e9c30/gefowudiwibiji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72280ff1-b0cc-4df7-bfde-7384981ac9ac/72947334364.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d78658a-1849-4500-9763-03ff16e2f019/zefunafige.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_off0000f11c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF11C	21760 bytes
SHA-256: `fe9423058680720fa1b91138bf4be92f7a997448e864f5271a89e6cd43366e6f`
`font_01_sfnt_off00013603.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13603	5372 bytes
SHA-256: `2bd1b4ae30addb94d49de8e6c71a958d29be98097a5a9af64dfb621f1e88e2e7`
`font_02_sfnt_off0001483a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1483A	11720 bytes
SHA-256: `4ad4a1404d3f6389908a8a4aa485c919326645f139bd923bb16c9fcfae25a020`

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