PDF malware analysis — malicious · 823f855095cc7a62

MALICIOUS

PDF

40.7 KB Created: 2020-09-03 20:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 41d69b5fa0c34a27f4eaef28dbd6fbee SHA-1: 7c43be5f06133e565b8d2c45ef3f337375ed352f SHA-256: 823f855095cc7a62d00161ad621501c232dac70236435a6a01bdae1d309e0534

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One of the embedded URLs, 'https://ttraff.club/wix?keyword=photo+video+camera+app', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting an attempt to drive traffic to malicious infrastructure.

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://ttraff.club/wix?keyword=photo+video+camera+app
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/c7ef1a_ef52028dcf6941399bbaa3a42779d8fc.pdf
- https://static.usrfiles.com/ugd/b8c837_45f32cf3ec2948f5b6d9871cdedec016.pdf
- https://static.usrfiles.com/ugd/d55797_c53831f67de840ce8c37a1b59b9ffd78.pdf
- https://static.usrfiles.com/ugd/bc84a3_49986f8eb70b471ea1de033a32b86a9c.pdf
- https://static.usrfiles.com/ugd/60933b_90a4b20d415c4ad0a216df7b38692efa.pdf
- https://static.usrfiles.com/ugd/0adedf_4bf79b90fd0e4a67900014780cabf68d.pdf
- https://static.usrfiles.com/ugd/8b49c6_5d09b2fb70ee4e27b0e4ffac672e74f1.pdf
- https://cdn.shopify.com/s/files/1/0431/6151/8231/files/66105218223.pdf
- https://cdn.shopify.com/s/files/1/0463/6537/6667/files/70094184699.pdf
- https://cdn.shopify.com/s/files/1/0434/0459/1255/files/luxenogoboja.pdf
- https://cdn.shopify.com/s/files/1/0431/7777/1164/files/garixubogedanu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006118.bin` `77b2e76976a266f9fb09258477ddbe6a3950220429a701aa19b4324c6712a429`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6118	5164 bytes
`font_01_sfnt_off00007285.bin` `a7276b31a9e9136b6ae2fab8980a67fd211b02709c10fb4f0f3b621690377845`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7285	10536 bytes

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