PDF malware analysis — malicious · 43043e09fcbb6b6c

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 19:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f57ddf35a8a6ef83721d36dedf37af79 SHA-1: de3bbd80f5cd3e4e83c744bad2031fad87b3bc86 SHA-256: 43043e09fcbb6b6ccec1838b80773ab2c76d86179a81b531920f8ca29a2a6e28

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with 13 external PDF links, including a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=infiniti+g35+manual, which is flagged as malicious. This suggests the document is designed to redirect users to malicious content through a series of 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.me/wix?keyword=infiniti+g35+manual
- https://static.usrfiles.com/ugd/b8c837_8657b16b46ef4a44aa561a4287601a24.pdf
- https://static.usrfiles.com/ugd/b8c837_e744b3cc5f4b4944b7eb28dee483e83d.pdf
- https://static.usrfiles.com/ugd/b8c837_5ba32c53e07e478bb5d9789dcc64f4a8.pdf
- https://static.usrfiles.com/ugd/d54300_9b447f1411f6442daf5da9c8f0460995.pdf
- https://static.usrfiles.com/ugd/b8c837_5c5d0e8ef8cc449fb11bb7d577dc25a8.pdf
- https://cdn.shopify.com/s/files/1/0430/4375/0039/files/andhra_pradesh_political_history.pdf
- https://cdn.shopify.com/s/files/1/0428/2020/6758/files/68517968184.pdf
- https://static.usrfiles.com/ugd/b8c837_5a2ae5fa401d4fbb9a4995112b141324.pdf
- https://static.usrfiles.com/ugd/b8c837_d81b9089030945d886ddd7c35c0b34d2.pdf
- https://static.usrfiles.com/ugd/289c5e_c29bb85be02f4c20a5e884545bfd7430.pdf
- https://static.usrfiles.com/ugd/b8c837_35e653a4fa064e6c8cdaa1d8459c6d2f.pdf
- https://static.usrfiles.com/ugd/b8c837_a3e060cd61624e13923302f728930d53.pdf
- https://static.usrfiles.com/ugd/b8c837_a230fa2142044e48af3935b18ed18634.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_off00006422.bin` `81d0f574b571a4ff3fbf98cd1ab574aa63fcc400909ad2a58155c5d2836e8094`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6422	5036 bytes
`font_01_sfnt_off00007541.bin` `a4486f871c3b17b66627d3a191daef7fbb7a7d64d9de69dec26df94ca56900a4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7541	10668 bytes

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