PDF malware analysis — malicious · 0266e9c68da5d7d7

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 04:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3a84586649ad5d84a1912ff2a78e4ad6 SHA-1: 52011b0998d0548e7d0250aef86f8a47f8b8ef4d SHA-256: 0266e9c68da5d7d7375f3d2258394d74335ad28bb07e25f1527aeca269c52f98

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external PDF files, which is characteristic of a link farm. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead users to harmful content. The ML classifier also strongly indicated maliciousness.

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=exemple+de+discours+de+comm%25C3%25A9moration
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_9fb24b56143f48fe9235d6d03ba7d6b2.pdf
- https://static.usrfiles.com/ugd/b58d21_d5a2d679f551410cac1e5be15d107391.pdf
- https://static.usrfiles.com/ugd/0cd019_28ace2888254420da608149908cbfdd2.pdf
- https://cdn.shopify.com/s/files/1/0429/6205/9427/files/fedobagirel.pdf
- https://cdn.shopify.com/s/files/1/0434/7327/2992/files/futolopamuxupuzil.pdf
- https://cdn.shopify.com/s/files/1/0437/5016/2583/files/keto_diet_recipe.pdf
- https://static.usrfiles.com/ugd/b8c837_b3ac721f6209430e97512b755d429ab6.pdf
- https://static.usrfiles.com/ugd/4dd980_856b9af04cc541e19db1328a03521def.pdf
- https://static.usrfiles.com/ugd/b8c837_d5910a8b2efe4dafa99e18bd97a813a8.pdf
- https://static.usrfiles.com/ugd/b8c837_06be2f7c8e9b444bb602d682ebe931fd.pdf
- https://static.usrfiles.com/ugd/b8c837_98b8e68f9a124837b2e32dd7f6625552.pdf
- https://static.usrfiles.com/ugd/217d68_a0fe9af15e5743cdbec58422bb8bd609.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_off0000631c.bin` `efc881cfd8a7eac35e1e015e74a44bda3bb6d744a355cbf2eb3155d88bddda52`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x631C	5388 bytes
`font_01_sfnt_off00007514.bin` `bb15717485e4cee8dd34154bdc469e63cb6ff6bc858823c17e8d969688e1a039`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7514	11376 bytes

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