PDF malware analysis — malicious · 6ec283fc481dda16

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 13:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 048349913d50ce235d67b4066462c040 SHA-1: 091df0694c1f536a522a3963c04833d81c6540ba SHA-256: 6ec283fc481dda167bf24c1ccf912e3594ec4e7628f0cd4b9e6e575926281526

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=customer+service+skills+for+success, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other links to external PDFs, suggesting a link farm or redirection tactic. 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.com/wix?keyword=customer+service+skills+for+success
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/0d9a50_0985dd7df7eb419588b6cda0b6569e64.pdf
- https://static.usrfiles.com/ugd/b8c837_3743659eb6c8433fa757ec478e5318f0.pdf
- https://static.usrfiles.com/ugd/b8c837_b060cc17e58c43a089529cbf2b9da602.pdf
- https://static.usrfiles.com/ugd/b8c837_76d276ffe12444f898c6fe1794281ac0.pdf
- https://static.usrfiles.com/ugd/b8c837_ca8b8eee8d4640038560f46e57c8d783.pdf
- https://static.usrfiles.com/ugd/b8c837_1eeb1d42e4af45868d3c1e9680d850aa.pdf
- https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
- https://static.usrfiles.com/ugd/b8c837_3c927daec25a43e19492cef53399f345.pdf
- https://static.usrfiles.com/ugd/b8c837_adc7cf4e764b466c9ac32780711d6a67.pdf
- https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
- https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
- https://static.usrfiles.com/ugd/906e9f_7bd9473ccbe642329ec7ecc0d53b934d.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_off00006ce8.bin` `a4efa2781213173947988da80a2d6fd4161298e7a837eaabfadba19f99e0cabc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CE8	4844 bytes
`font_01_sfnt_off00007d5a.bin` `399ae4c2011feabbd3f5ac55a522b8f552e89a84c48a2eb39cc9aeced2d56435`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D5A	10304 bytes

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