PDF malware analysis — malicious · 144df18e97bd5bb8

MALICIOUS

PDF

34.4 KB Created: 2020-08-30 15:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f070190d5e9f2d6c15a7d6c1ffee17b SHA-1: ba61dbf841b0d45cfc00cc8c91d6693090172e57 SHA-256: 144df18e97bd5bb8ee5d205c60e65c0709946135c5331bfafc0ddcb921e315c7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate the document's purpose is to direct users to potentially harmful external content. The ML classifier also strongly flagged this PDF as malicious.

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=ultra+feminine+sissy
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static.usrfiles.com/ugd/e745be_b1f2b946532a4567b94afde67c9e7c63.pdf
- https://static.usrfiles.com/ugd/73cb9e_ca0c9be3a8a5451aafc91c949c68a2a3.pdf
- https://static.usrfiles.com/ugd/b8c837_a06eea6c7f914cccb98efea958a5012a.pdf
- https://cdn.shopify.com/s/files/1/0434/2834/8056/files/popurujavekakonow.pdf
- https://cdn.shopify.com/s/files/1/0433/5039/2984/files/loditobubug.pdf
- https://cdn.shopify.com/s/files/1/0437/9007/4005/files/google_plus_profile_pictures.pdf
- https://cdn.shopify.com/s/files/1/0436/0932/5730/files/pegejapub.pdf
- https://static.usrfiles.com/ugd/b8c837_39a7e07516dd45019b2af0ae4b07613c.pdf
- https://static.usrfiles.com/ugd/b8c837_e3dcb6f9f96d49f39e6506ed47859c05.pdf
- https://static.usrfiles.com/ugd/c068f8_9d7689504fae42fda65bf379b9507072.pdf
- https://static.usrfiles.com/ugd/f7fbc8_ce8b2a94a1b841179c2f0c20a4d1f9cd.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003fb9.bin` `fae6421b6f0c5d1a440e609ba07b405d96b214d7b167855684aeed3ae339012d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3FB9	4684 bytes
`font_01_sfnt_off00004f78.bin` `89b8060038032355502e217918c67843099872edb84a57bb6db1f93af34c7ba0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F78	9272 bytes
`font_02_sfnt_off00006f3c.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F3C	4324 bytes

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