PDF malware analysis — malicious · d2c12ed772308480

MALICIOUS

PDF

53.4 KB Created: 2020-08-30 18:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e506bacb2af6a5d0cd03012127a7ec1b SHA-1: 7d749610fc6030ec1c419676212c6c3613f5fe81 SHA-256: d2c12ed77230848071a94a46eef2b4c64a54975cc3c283a3d774d02f6aa496f2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a search result for anatomical information. This suggests a phishing or scam attempt to redirect users to malicious content. The PDF also hosts a link farm of other PDFs, likely for SEO manipulation to improve the visibility of the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated.

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.ru/wix?keyword=surface+anatomy+of+human+body+pdf
- https://static.usrfiles.com/ugd/b8c837_5caa34744e3742ebaa30f1b18443d392.pdf
- https://static.usrfiles.com/ugd/8acad3_7f9e9c5b0b3a49a89b63d51bf3e85066.pdf
- https://static.usrfiles.com/ugd/4dd980_2a26f885653641bda2c69f0c9f9f8a5b.pdf
- https://static.usrfiles.com/ugd/c0b427_fc320f48b53046ce9a186a43e3f69033.pdf
- https://static.usrfiles.com/ugd/277b62_8cd5af36d6134128843eab54eee7c854.pdf
- https://static.usrfiles.com/ugd/b8c837_c5fec7998f894ceabaf8546830461235.pdf
- https://static.usrfiles.com/ugd/b8c837_1e8e8454c5ca4b17a035b86919f28ad0.pdf
- https://static.usrfiles.com/ugd/b56239_925d7002486b446e854573d929a231ed.pdf
- https://static.usrfiles.com/ugd/b8c837_57978bbb18fc40db95180635c483c4db.pdf
- https://static.usrfiles.com/ugd/b8c837_f08824529f9b4738bcc0c7db2681c5c1.pdf
- https://static.usrfiles.com/ugd/b8c837_a0331eb4ee9540348f9be31056ac4d6c.pdf
- https://static.usrfiles.com/ugd/1e32c2_10256b1af383495c884905f745fbb205.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_off00009215.bin` `dd6756a740bce1e1e360cbca24ab71f418e7038417fe82475d24a8e0c6b69c0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9215	5532 bytes
`font_01_sfnt_off0000a4b4.bin` `603a10c257a2047128d0651d487a7997da63c3eebc1714e1dffcf1f182f080ac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4B4	10660 bytes

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