PDF malware analysis — malicious · e7f98df65bcedbd5

MALICIOUS

PDF

35.1 KB Created: 2020-08-31 02:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c94c43aa13134e5efaf6c8a31600ce07 SHA-1: a36849830ede6c063974ade1c31e8058d4705e67 SHA-256: e7f98df65bcedbd594267326febc1f4df22a750a10de1f5ea4d286f1dce79fa3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the malicious URL, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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=hak+735+helicopter
- https://cdn.shopify.com/s/files/1/0438/5210/3845/files/80726272108.pdf
- https://cdn.shopify.com/s/files/1/0439/2878/0955/files/blockchain_in_food_supply_chain.pdf
- https://cdn.shopify.com/s/files/1/0430/3205/1873/files/34110051555.pdf
- https://static.usrfiles.com/ugd/b8c837_da1b8b8407d442d7998881b1a0444216.pdf
- https://static.usrfiles.com/ugd/77941b_d7b7e5cd03d14c93a5a3df21cae6237d.pdf
- https://static.usrfiles.com/ugd/1b8612_085016e8e8b749e89c4767e040b151c1.pdf
- https://static.usrfiles.com/ugd/64d889_14b71a27ec51411eb029ba878ddd93e6.pdf
- https://static.usrfiles.com/ugd/2e4eb4_640dd394fe394f569b133d2b58fe969f.pdf
- https://static.usrfiles.com/ugd/b8c837_0e37d9bcb5aa4f9781260b1852ae9bb6.pdf
- https://static.usrfiles.com/ugd/b8c837_0c74718e4fbe434ea351fb67400623f9.pdf
- https://static.usrfiles.com/ugd/b7ab08_ebffb786bc1f44849caa5397f77b1329.pdf
- https://static.usrfiles.com/ugd/2ca09c_46a5cb88d2474935adff6502aeaefc9e.pdf
- https://static.usrfiles.com/ugd/a01749_218e11ecfaac4cb3ba4baee1dd7fa655.pdf
- https://static.usrfiles.com/ugd/c3f88d_4b14434e6a2c4e19b6b04de7c5c5e247.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_off00004ca1.bin` `2481d667feeb880244c4869f1bbb2aa331f6d7a228766451a8638560723b73e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CA1	5236 bytes
`font_01_sfnt_off00005e62.bin` `140ac680e8d148ae57f52c00c8e444282d6d8f6dd97d9cfec51bb6aa68c4ae16`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E62	9896 bytes

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