PDF malware analysis — malicious · 3eede6a64bb82e14

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 17:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e95e1098a6094dbce701620dec0fa636 SHA-1: dd6358ff97c7b21b3520b8a9738d385a825c1fd8 SHA-256: 3eede6a64bb82e1401c54db0462e1468fe27e2e3ca431067d9b280bc8c057da1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The document body contains the redirector URL and other URLs, suggesting a link farm or SEO poisoning attempt to lure users to malicious content. No scripts were extracted from this sample.

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=level+up+dark+souls
- https://cdn.shopify.com/s/files/1/0435/4136/4890/files/gozonilejabu.pdf
- https://cdn.shopify.com/s/files/1/0463/8857/6411/files/for_which_of_the_following_mixtures_will_ag2so4s_precipitate.pdf
- https://cdn.shopify.com/s/files/1/0440/8619/8424/files/fimiwalevimevebabuxo.pdf
- https://static.usrfiles.com/ugd/b8c837_bf8c1b0fa2ee44d4af2c781ab214e05d.pdf
- https://cdn.shopify.com/s/files/1/0437/0500/8293/files/dawigadu.pdf
- https://cdn.shopify.com/s/files/1/0434/8451/2418/files/nepoxigojemirup.pdf
- https://cdn.shopify.com/s/files/1/0430/8955/9705/files/maperivipikaxiwekunowotul.pdf
- https://static.usrfiles.com/ugd/3aee12_46bb702d2e36450889f8f70db53c57c3.pdf
- https://static.usrfiles.com/ugd/455f95_3e549b53d1684b479d7c02b89ae8a6a2.pdf
- https://static.usrfiles.com/ugd/a2d007_1692cd8e70054a788c883a9dca234558.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_off00005cad.bin` `9597767f4ff6717b5db7258a7bb9df7975132cd2ea3423dfab01dca51538fc8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CAD	4668 bytes
`font_01_sfnt_off00006c9d.bin` `e0b39b498a509664acba3de57b2445fc8a366795833a00e0516a9ca6f1b20290`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C9D	9172 bytes
`font_02_sfnt_off00008bf1.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BF1	4324 bytes

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