PDF malware analysis — malicious · 9b95b16ca024b1a5

MALICIOUS

PDF

72.9 KB Created: 2020-08-29 12:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 086a5544638217d13209e0a7f35a2ba2 SHA-1: 836efb7fb17f8ec748310e23ff3a3f557cd26967 SHA-256: 9b95b16ca024b1a550edbfca6ac5debda3fb9900dd8771599d6ee0620dcc9cbb

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that is disguised as a document title. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic.

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.com/wix?keyword=types+of+joint+venture+pdf
- https://static.usrfiles.com/ugd/b8c837_c7a2efb57d334b43a410f4bb6a2c7c06.pdf
- https://static.usrfiles.com/ugd/b8c837_6e47c7c7d1a6442d8ebdcdc9369fa4d1.pdf
- https://static.usrfiles.com/ugd/b8c837_016a29e3e94a40f4b5984c3d50536dca.pdf
- https://static.usrfiles.com/ugd/b8c837_666cbe65a6bd483ca6d6cdaa53b50171.pdf
- https://static.usrfiles.com/ugd/b8c837_2b2affc28d424d37883529a506e8c575.pdf
- https://static.usrfiles.com/ugd/ca32a8_0a8fdbc22b724e00a080d7a75af1fecf.pdf
- https://static.usrfiles.com/ugd/b8c837_fa3f1faec73e480c94bc9a41c8222df8.pdf
- https://static.usrfiles.com/ugd/b8c837_76f7ee479eb447a5a2063199f30af741.pdf
- https://static.usrfiles.com/ugd/b8c837_7b6363682b9d43918f92aa7bb1a236d0.pdf
- https://static.usrfiles.com/ugd/b8c837_8ef2931f2fca4d4a996132cce2ed8624.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufabolip.pdf
- https://cdn.shopify.com/s/files/1/0431/4441/3350/files/66498027705.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c56a.bin` `9bd9b036d31f7dac13fd14b9e95216f3a4979d61bf06a8a9f75b60174b2dcf5c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC56A	8268 bytes
`font_01_sfnt_off0000e106.bin` `abe77095409e62340064039a19de3aa846fdcfa1adf5d6c8b9625185bd50a344`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE106	4980 bytes
`font_02_sfnt_off0000f220.bin` `f4fb8e37d575ad961b0f720d43a2fc420eaaa2503d4d47bbed7cfc464a2beb60`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF220	10636 bytes

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