PDF malware analysis — malicious · b7815d782364133e

MALICIOUS

PDF

88.9 KB Created: 2020-09-06 01:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ee07d5422d298a062cbc996db50ead5f SHA-1: 9a789f302e1224635b707d9baa9cfcd6c14d8282 SHA-256: b7815d782364133e68ca144c15191ca2a66aa4bb0a3bc631e7a3c8b8cf0b057b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link to 'ttraff.club', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to 'static.usrfiles.com', indicates a link farm strategy, likely to improve search engine ranking and distribute traffic. The ML classifier strongly supports the malicious nature of this PDF.

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.club/wix?keyword=free+printable+employee+name+badge+template
- https://static.usrfiles.com/ugd/6f9b04_b5a0c88d25db4ca59c79dfa88f1b8231.pdf
- https://static.usrfiles.com/ugd/8b61cf_33a95ed6bfc74cc78305979b8a128c66.pdf
- https://static.usrfiles.com/ugd/b8c837_e60d38d172564e7582d1c6a0d27d4e02.pdf
- https://static.usrfiles.com/ugd/ac1638_e7affb835824422197a75745215f21fd.pdf
- https://static.usrfiles.com/ugd/c57cae_5f88a8d2cd5343608c1becc55a2ec038.pdf
- https://static.usrfiles.com/ugd/eaf48f_22c67acb238c4fa8bb7221ff5b373865.pdf
- https://static.usrfiles.com/ugd/3d0627_1735b207e5ca4d57aee3872c04b4aa6c.pdf
- https://static.usrfiles.com/ugd/b8c837_c5751e6bda844f2b8fa809d0d9be069e.pdf
- https://cdn.shopify.com/s/files/1/0434/1596/1762/files/pmp_scope_management_plan_template.pdf
- https://cdn.shopify.com/s/files/1/0435/3087/9136/files/hotstar_vip_new_app.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_off0000fe25.bin` `2f7464170358b3ef7b23b2b3675c30d9ea398089809aaa80736747e871d9ee08`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE25	5296 bytes
`font_01_sfnt_off0001101d.bin` `75a12432901b3e6553ff0490a4364bb9422f2cdcea93eac035424fbe90d893a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1101D	15868 bytes
`font_02_sfnt_off000141d7.bin` `4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141D7	16060 bytes

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