PDF malware analysis — malicious · 4792aaecf3f8777c

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 09:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 39010350c65f3ae40b7fefa5c4792dcc SHA-1: c72fa1ad36965e3da2c52c86e36061754c2554ef SHA-256: 4792aaecf3f8777cb96e74fcd6e3053a071de34146ed0215e5895598e82e293f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'magnavox dvd player mdv2100 remote code' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL.

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=magnavox+dvd+player+mdv2100+remote+code
- https://static.usrfiles.com/ugd/b8c837_b71178487f704287a6a27ae5abc15c90.pdf
- https://static.usrfiles.com/ugd/b8c837_ef3a5826b81447a38677df76b31ebf58.pdf
- https://static.usrfiles.com/ugd/724bd4_da23467be26e4d108f7c968bc4a6b5b4.pdf
- https://cdn.shopify.com/s/files/1/0443/9543/0054/files/34093750822.pdf
- https://cdn.shopify.com/s/files/1/0431/6656/4503/files/8389726137.pdf
- https://cdn.shopify.com/s/files/1/0433/4849/2438/files/62227504738.pdf
- https://cdn.shopify.com/s/files/1/0433/7005/3782/files/suguwavuweziso.pdf
- https://cdn.shopify.com/s/files/1/0429/1523/3948/files/2675922465.pdf
- https://cdn.shopify.com/s/files/1/0429/7788/6367/files/68214432018.pdf
- https://static.usrfiles.com/ugd/b8c837_f1f3fc62060444268636af0ee19442bb.pdf
- https://static.usrfiles.com/ugd/b8c837_a8a5c00ffe6a4e989d73a36d8f216866.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_off000053b7.bin` `a8fef0c6fdbf9a605f28e2eea5c058ebb85847eb822cd16b687cc12056df812c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53B7	5516 bytes
`font_01_sfnt_off0000667c.bin` `baef72b311e2a9fb150c1a90bbf5165f5d39095dff20b5795e34f3b473b33182`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x667C	13160 bytes
`font_02_sfnt_off000090a0.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90A0	4324 bytes

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