PDF malware analysis — malicious · 3d1ccce80d2acfe5

MALICIOUS

PDF

35.0 KB Created: 2020-09-06 13:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e70db7dc8ab841293e9665e76e00179c SHA-1: d3b1e12e63f27e2d9da0b6b40cbb836a2d396b23 SHA-256: 3d1ccce80d2acfe5c3c307cb090934452257f0baf1f4228b771932e90f570dfb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a mass of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary URL identified, 'https://ttraff.link/wix?keyword=first+grade+math+worksheets+ten+frames', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to educational content, likely a lure to entice users to click the malicious links.

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.link/wix?keyword=first+grade+math+worksheets+ten+frames
- https://static.usrfiles.com/ugd/b8c837_d6d57d5762ee48f79593b888510bdd04.pdf
- https://static.usrfiles.com/ugd/bb10c5_0c27e3f1542f470baa70cc46dad1127d.pdf
- https://static.usrfiles.com/ugd/77d535_0d1ff2fb0f394a0687cb4cb89cb64cda.pdf
- https://static.usrfiles.com/ugd/27135d_f81a73e0cfe14456843ca4e69edbb1a2.pdf
- https://cdn.shopify.com/s/files/1/0433/4397/0463/files/sasedax.pdf
- https://static.usrfiles.com/ugd/ea9bdf_d1aa842834f949bdba91b94d46260e6e.pdf
- https://static.usrfiles.com/ugd/3db607_e0154d0451f541b49897c3374a557fda.pdf
- https://static.usrfiles.com/ugd/822ecd_8abdbb8b507c421f97bc4bfb77c968d9.pdf
- https://static.usrfiles.com/ugd/d99ef3_46834bcb479248b88fe9cf87df26016c.pdf
- https://static.usrfiles.com/ugd/9ff9b8_d5cf922b3d3d4bcc97fba0446c432a8b.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003ff2.bin` `0ade04cfa7b4f8ea007053d574acd152847075b04ea96760c6a3b7cf95e14710`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3FF2	5188 bytes
`font_01_sfnt_off0000517d.bin` `b44f06efec17d7d40d7a48d43123efb073407176f9435ca5bc2f8366e9019f5c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x517D	9360 bytes
`font_02_sfnt_off00007182.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7182	4324 bytes

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