PDF malware analysis — malicious · 097245df4cf33b12

MALICIOUS

PDF

50.4 KB Created: 2020-08-30 01:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4b2827a0ce9139e16f5666af9dab5099 SHA-1: 31be3800d09b74a65c785fa63833d7ef4ffb2db6 SHA-256: 097245df4cf33b12b19a17d80c6dcf16ce92e1178cec400fa79fd945c0dae8f5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains text related to a "free download" and the malicious URL, suggesting a lure. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation to drive traffic to malicious sites.

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=venus+factor+free+download
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/20d83a_39d367cd307d432e9137dbc004730fba.pdf
- https://static.usrfiles.com/ugd/b8c837_7f92117751674146a6ad2d0bfaccd715.pdf
- https://static.usrfiles.com/ugd/b8c837_de1982beb60f4633a0fc9de9b3d86fd8.pdf
- https://static.usrfiles.com/ugd/b8c837_cff675cc254f44c1bde6a67e3e295c02.pdf
- https://static.usrfiles.com/ugd/b8c837_857fd19f984e4c0fa702c7e3211b0246.pdf
- https://static.usrfiles.com/ugd/0c8cc8_decf9ebe6f444025ad93280f15f70815.pdf
- https://static.usrfiles.com/ugd/dcfb95_020974fddc764bc9ba6948c4cae5082a.pdf
- https://static.usrfiles.com/ugd/b8c837_2022674e470743d2b4a94ddb18289e38.pdf
- https://static.usrfiles.com/ugd/b8c837_beca9e4ba94f44a2b7e5625795313e4e.pdf
- https://static.usrfiles.com/ugd/95089d_112b60c8ce3b4beea9efffa98007642d.pdf
- https://static.usrfiles.com/ugd/b8c837_bc15fbd2af7f40538e429bed6b43baaa.pdf
- https://static.usrfiles.com/ugd/b0b521_5429572181424aed9e7774f5bf527d5d.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_off000086fc.bin` `871244c7233c831ea48c951167835e936f05ab4ab4bf21fb2ac018457610ecb8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86FC	5072 bytes
`font_01_sfnt_off00009859.bin` `2d2ba71ef451bfbce4ab338376aa14e1c98bd73a797aa13fb744dbaaf180e8d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9859	10980 bytes

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