PDF malware analysis — malicious · 9819499431af028c

MALICIOUS

PDF

49.8 KB Created: 2020-10-18 08:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 326642b812d13090927528b3dd14781b SHA-1: e127b2b3af57f41c64a64d37846357ea14c6124b SHA-256: 9819499431af028c6c37420dd6706886eea431f5007ee74a53aece20de6cff97

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a potentially malicious site for phishing or further payload delivery. The presence of numerous links and the specific redirector URL strongly indicate a malicious intent.

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=sefer+raziel+hamalakh+download In PDF document text
- https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/290f36f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374954/normal_5f8925d206a28.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365998/normal_5f8755becb0cc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369152/normal_5f8bcd30a6c3e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377663/normal_5f8a92aeb59c7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380393/normal_5f8bad972ee64.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2225/3205/files/3684707983.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/3235/4205/files/59832443395.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/6372/0119/files/alphabet_letters_practice_worksheets.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/7145/8468/files/algebra_1_regents_june_2019_answers_jmap.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8566/9279/files/invoice_and_receipt_app.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/1098/8442/files/jofisorokubufitatofobika.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/1252/9587/files/gumoji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b3202f23-52a4-4738-b32f-aea9606daa3d/lamoluzuzoronepugad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e9822b6-86ca-4eb3-b400-ca5bad1138f3/jawewometirujevafidib.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/74f0dde0-7f85-460d-9302-1dec30e9714d/41244107256.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/934ae742-6292-4ad0-8f1c-22d2625aa051/29817154309.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2fb3ad44-f7db-429f-a885-3aacdd95281f/zanetinerugiroxaberupuvim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97b337ce-e06f-41a9-bd98-bd687c4294c6/xudojumegutadufetigoron.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28cb536e-dbfb-49c2-b7a4-019f3d29fd52/81430768165.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69d2eace-8d66-4001-83ac-a32c8041b18f/56761103460.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_005_off00009fa1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9FA1	17548 bytes
SHA-256: `48e8368b0f5be9d51389e0f8676cdf88ac6e0279fdc354d0a5398c030c9a4d38`
`font_00_sfnt_off00006afe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AFE	5280 bytes
SHA-256: `851a321df7223ccc107ddef19d74627beae86ded4a2944e9f0f449468c80690f`
`font_01_sfnt_off00007cde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CDE	10188 bytes
SHA-256: `ca7cadcda8b25b71eee6f68b6dd2db2fbffa5129fa10643fd52e2e9d8fc4c747`

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