PDF malware analysis — malicious · b5ed23929df54a51

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 04:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0b2aa2799645c35f0536516159156c01 SHA-1: 417f04f6a7a0d49cd45845374a10ad078c95229b SHA-256: b5ed23929df54a51b868f1a13ab571fd4ef98d75d0dc21df9d0cdf86f7f5f397

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'avs video editor 7.5 crack free down' and the malicious URL. This suggests the document's purpose is to trick users into downloading potentially unwanted or malicious software via the provided link.

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.ru/wix?keyword=avs+video+editor+7.5+crack+free+down
- https://cdn.shopify.com/s/files/1/0437/4288/8097/files/26367490873.pdf
- https://cdn.shopify.com/s/files/1/0429/7372/4825/files/jiwudoxemufip.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
- https://static.usrfiles.com/ugd/b8c837_af261f6360c346d684d920b93d5a5342.pdf
- https://static.usrfiles.com/ugd/b8c837_e4506f7c46214facacc6fc0c8b826402.pdf
- https://static.usrfiles.com/ugd/b8c837_d34207c01fbf4fe7bd429f977bf8b467.pdf
- https://static.usrfiles.com/ugd/b8c837_82604b37717b438c8eb4eb3c6dadff66.pdf
- https://static.usrfiles.com/ugd/b8c837_d75d49960f9c47feb215f5ad939edd75.pdf
- https://static.usrfiles.com/ugd/b8c837_2b20d45d18b94ade923c547aeb79234d.pdf
- https://static.usrfiles.com/ugd/b8c837_a0fd6ca95ad748b29772bbf24b52a278.pdf
- https://static.usrfiles.com/ugd/b8c837_7d9c1b7c5fdc412f8793aac7ea0c75cd.pdf
- https://static.usrfiles.com/ugd/b8c837_9586012e658f4a18b04395e18214053e.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006826.bin` `3ca7066f711cb1065e72f3dc5200ff651e4ca9913fe1e9804e37709c91df4313`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6826	5424 bytes
`font_01_sfnt_off00007ad3.bin` `816bf68cfdc759dbeae801d64da73d238df58176373a0b8fe547f4b051bb8768`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AD3	10420 bytes

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