PDF malware analysis — malicious · 998a391e6630b585

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 02:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: edef892b1eccef32482e891354795bde SHA-1: cf0e219c4ccceda5cfcdb5e66c45883b0deef1f6 SHA-256: 998a391e6630b58530609185bc4e9f05c96e502c325271eb3dfd4d4463a52de7

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 pointing to a known malicious redirector service (ttraff.com). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection links.

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=georgia+criminal+justice+reform+2019
- https://static.usrfiles.com/ugd/f14cf6_a18867a22e5a44e8a61e44f5bfda17c2.pdf
- https://static.usrfiles.com/ugd/de3d83_bd4bc043310547b6b639a6eaf1225e03.pdf
- https://static.usrfiles.com/ugd/b8c837_e779b13cfdce488bb4cb7acf164f97d5.pdf
- https://static.usrfiles.com/ugd/136d07_c73172fc755542f0b3497fc979e9ff91.pdf
- https://cdn.shopify.com/s/files/1/0433/6903/7974/files/14250658357.pdf
- https://cdn.shopify.com/s/files/1/0437/9967/5041/files/vazefez.pdf
- https://cdn.shopify.com/s/files/1/0430/6649/1042/files/sosafokubefexugir.pdf
- https://static.usrfiles.com/ugd/902d29_0fb1ea4ce69d4cdb8c0debca67707dee.pdf
- https://static.usrfiles.com/ugd/90c678_5c68f02b909a43b293056341bc586036.pdf
- https://cdn.shopify.com/s/files/1/0431/9825/1165/files/43940018732.pdf
- https://cdn.shopify.com/s/files/1/0428/4809/2327/files/annotated_bibliography_essay.pdf
- https://cdn.shopify.com/s/files/1/0436/8472/4889/files/kululejofogaxezowuratu.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_off00006699.bin` `295c0a76245797a616b410dc6d9bfa395d9d49e616518108c782a05aadfd7324`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6699	5788 bytes
`font_01_sfnt_off00007a49.bin` `94136fa5e1260bbd2138ed755e66a0a34a343952747ca8cae5d9d76833ebd48d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A49	10304 bytes

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