PDF malware analysis — malicious · 046909e4775afd47

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9175319547e96e4c4808e5f54de118b SHA-1: b9a189db97526a2bc606f230764520a05b661ded SHA-256: 046909e4775afd4790c0f1896574a87d2cfe37f316b514e709f1430865f69f98

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link disguised as interview questions, which redirects to a known malicious URL. The PDF also contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The ML classifier 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.cc/wix?keyword=cognos+report+developer+interview+questions
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_ef64db22aab343f0991277b148a2d49d.pdf
- https://static.usrfiles.com/ugd/99965f_333db6b6471f4524baa861f6e0e6ee39.pdf
- https://static.usrfiles.com/ugd/b8c837_88492bafbfee4ccebaf47e4fe01bd625.pdf
- https://static.usrfiles.com/ugd/b8c837_cc57052941664a6e85045ed2ea64d616.pdf
- https://static.usrfiles.com/ugd/0511f5_8ef7f7b7bbd643e5b291161b64fd38a5.pdf
- https://static.usrfiles.com/ugd/d5415a_635835e7ee1848979e4482df84ab1a94.pdf
- https://static.usrfiles.com/ugd/e2f7e1_2c99e912fd334525aa8f82ff2fff10a9.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdf
- https://cdn.shopify.com/s/files/1/0431/4470/8245/files/numuvagifusupafujir.pdf
- https://static.usrfiles.com/ugd/cfbfd2_4a2fc94b12794c7c990967764a59b6e5.pdf
- https://static.usrfiles.com/ugd/b8c837_2cce5fc364844c828ead48127fa3a40c.pdf
- https://static.usrfiles.com/ugd/0baf77_315cff6e322f4ee78e18f4d5e58c5ac1.pdf
- https://static.usrfiles.com/ugd/2b25b5_0f27e947518244b68578477398b82a46.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_off00007374.bin` `f80d6223340dade2a3507d5442f880affe218143084c508dde0bad701bebdb11`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7374	5100 bytes
`font_01_sfnt_off000084eb.bin` `2a814984c05e013fc79249d4e2744f53cc4a5e3fbcfc362892ed8d4bd45a5a1b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84EB	13728 bytes

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