PDF malware analysis — malicious · 961f69fdeac87257

MALICIOUS

PDF

39.8 KB Created: 2020-09-04 20:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 31b9a3eea0e352c8e5e567bfdfd44f48 SHA-1: fcf8ae45a5ca6113e24c7d5778761e0f65a15ab1 SHA-256: 961f69fdeac87257e59261c8109aa578af172ea7dbf30c4913528a3f4932d43a

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a link farm and a malicious redirector. The primary link, 'https://ttraff.link/wix?keyword=auto+chess+mobile+apk+for+pc', is designed to lure users with a search query for a game, likely leading to malware download. The ML classifier strongly supports the malicious nature of this PDF.

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=auto+chess+mobile+apk+for+pc
- https://static.usrfiles.com/ugd/ea78e0_3cc66465a6c94ed0a6e9e3cf4081b7f6.pdf
- https://static.usrfiles.com/ugd/882da0_6248a8ad4467413cb7311a254228dc61.pdf
- https://static.usrfiles.com/ugd/7ab50f_3520a6658aab4c919325a84f023c046b.pdf
- https://static.usrfiles.com/ugd/3cb679_a32ffbd2b6a14885bbcbcad136a95aa1.pdf
- https://static.usrfiles.com/ugd/b8c837_d875483a2744488dac7ae11cefa3fc74.pdf
- https://static.usrfiles.com/ugd/4c4e45_02a75328a9ee4447b287b9504c833d8c.pdf
- https://static.usrfiles.com/ugd/eb4c03_d223841bd24e4cd6ab91e874c2a3c232.pdf
- https://cdn.shopify.com/s/files/1/0433/9384/3358/files/32646248474.pdf
- https://cdn.shopify.com/s/files/1/0430/6924/3549/files/57270272359.pdf
- https://cdn.shopify.com/s/files/1/0429/0802/4985/files/nubakusudulanagibef.pdf
- https://cdn.shopify.com/s/files/1/0436/0096/9896/files/kejexem.pdf
- https://cdn.shopify.com/s/files/1/0433/0084/7781/files/toboloforexagusazipo.pdf
- https://cdn.shopify.com/s/files/1/0427/7973/8278/files/dakudilubakugumawexewax.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_off00005db4.bin` `c4e57177e33a24b55a0f163a87d00829fde9f9b204141b19a54b832c2ef85f00`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DB4	5448 bytes
`font_01_sfnt_off00007011.bin` `ba3a0f46afb2caa78137b284c5d950fd779d1099088d5e7cc81dd959709cc07c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7011	10192 bytes

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