PDF malware analysis — malicious · 04a203fbfc1da9c9

MALICIOUS

PDF

35.6 KB Created: 2020-08-31 11:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2f5307b6917bfe54bf3e03d1bd56c55e SHA-1: b2523bf83431f8b2254b89285f28cdb4dabb9891 SHA-256: 04a203fbfc1da9c9b5bde20f371c8c9ef3e4c0eb90419ee461c553d234fd9f9f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest an attempt to lure users to external sites, potentially for phishing or malware distribution.

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=actividades+con+bla+ble+bli+blo+blu
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/cbe7f7_38add706c40e43b58368fb9860d3de0c.pdf
- https://static.usrfiles.com/ugd/6a7407_2d552bbdd57e4aa4aaf9cae19ed0b282.pdf
- https://static.usrfiles.com/ugd/9e53d4_1f2b06a932a64f0ebd7439eada03d4df.pdf
- https://static.usrfiles.com/ugd/b7306e_f4d666b2474c4d50b65c8655d96b3a2b.pdf
- https://static.usrfiles.com/ugd/ab922d_175fd70975c248b0a6d261d2246512cc.pdf
- https://cdn.shopify.com/s/files/1/0431/6043/6887/files/start_android_emulator_without_starting_android_studio.pdf
- https://cdn.shopify.com/s/files/1/0430/3536/1442/files/pefovapifeninipifikot.pdf
- https://static.usrfiles.com/ugd/ac72e0_6fef7bcbbbe849c5af7640160171af6f.pdf
- https://static.usrfiles.com/ugd/1c90dc_71faba91b69f4ad3a95909c043037910.pdf
- https://cdn.shopify.com/s/files/1/0459/9178/8706/files/dajadakafeboda.pdf
- https://cdn.shopify.com/s/files/1/0434/0311/6709/files/interval_notation_worksheet_algebra_1.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_off00004c9c.bin` `455f2c6b741128211f6fd33bac196861bd495ffa4f66e8e4d674a48af880ab02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C9C	5024 bytes
`font_01_sfnt_off00005dc1.bin` `e6ec289ca4730da4414db4eb93fcabbdd9eea915f8f925a737fd515079279a84`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DC1	10592 bytes

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