PDF malware analysis — malicious · b12f619d6b6aba6a

MALICIOUS

PDF

44.5 KB Created: 2020-09-06 05:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 36051dcc6132a050391de2b39e012f4f SHA-1: 2e10a293b3f9c979a308be3529a80e935dd4fbb3 SHA-256: b12f619d6b6aba6af5eb58e97dc2f63fd541075d51e94991c246e3df20b5715a

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a malicious domain, disguised as 'Caterpillar generators specifications pdf'. This is a common social engineering tactic to trick users into visiting a harmful site. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained a link farm, further supporting the malicious intent.

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=caterpillar+generators+specifications+pdf
- https://cdn.shopify.com/s/files/1/0432/5376/0160/files/java_8_language_features.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
- https://cdn.shopify.com/s/files/1/0430/6495/0945/files/anointing_of_the_holy_spirit.pdf
- https://static.usrfiles.com/ugd/61f964_e4931d17770b4c9aa9673c4ce09cbebf.pdf
- https://static.usrfiles.com/ugd/345929_a360beb4afcd4a4f87b0a53f93e6f76e.pdf
- https://static.usrfiles.com/ugd/f65518_4eac81093d274766963eb1c1afb5a8c4.pdf
- https://cdn.shopify.com/s/files/1/0437/6710/3645/files/81087652575.pdf
- https://cdn.shopify.com/s/files/1/0435/1783/7480/files/13376152823.pdf
- https://static.usrfiles.com/ugd/0286dd_c6c6b962b9784939aa46d5f185c26d02.pdf
- https://static.usrfiles.com/ugd/041b56_6c1ba48326fc41f99242c20450673ba7.pdf
- https://static.usrfiles.com/ugd/bc0b97_57dbdb17cf6c43459f97489304a389cd.pdf
- https://static.usrfiles.com/ugd/a4ea6c_b94e531ef18d43a397edac8d55bcd242.pdf
- https://static.usrfiles.com/ugd/12dc78_ba26325166854c3a9813ed92112dfd31.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_off00007014.bin` `7f78d786b5bbaab47de4b243f40e30c6097c6dee9ee7faf59aa088c6a34b337e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7014	5228 bytes
`font_01_sfnt_off000081e9.bin` `80aa9b801e7616325aeddf0ce1ff0b24e69f1f0dd398a99ba0e121145dde923f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81E9	10364 bytes

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