PDF malware analysis — malicious · dfbff0d2a32e029f

MALICIOUS

PDF

38.2 KB Created: 2020-09-03 10:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1a7d8d144425305f2cc362f19d926717 SHA-1: d156a9c2a576cbb0adfb48f362d2b4f97425f9ef SHA-256: dfbff0d2a32e029f7a7830fc3aa1a4f7b1dfb3c110d8493367f4ebc7c0821c9e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to what appears to be a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the malicious intent. The ML classifier strongly supports the malicious verdict.

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=vocabulary+and+grammar+choose+the+correct+answer
- https://cdn.shopify.com/s/files/1/0437/6703/8106/files/southwest_airlines_reservation_information.pdf
- https://cdn.shopify.com/s/files/1/0431/6053/5196/files/synonyms_antonyms_dictionary.pdf
- https://cdn.shopify.com/s/files/1/0437/1690/3062/files/punatiniwixitetebu.pdf
- https://cdn.shopify.com/s/files/1/0433/1077/6478/files/ntu_scholarship_application_form.pdf
- https://cdn.shopify.com/s/files/1/0432/2865/9880/files/luwamo.pdf
- https://cdn.shopify.com/s/files/1/0437/4154/4600/files/77620323570.pdf
- https://static.usrfiles.com/ugd/b7ab08_c5d67d84b100484da497012d99a38340.pdf
- https://static.usrfiles.com/ugd/b8c837_bb28072733b24862b11105ec8d3431bb.pdf
- https://static.usrfiles.com/ugd/0adedf_a4548715100746a187c9092f74ed260d.pdf
- https://static.usrfiles.com/ugd/f4de5e_8db847add4284e33b1ffe2e4d3c699b2.pdf
- https://static.usrfiles.com/ugd/2b98a3_26a80a16664a44199a423f5e2be27440.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_off00004e43.bin` `eaf43ddbc5ad86bfa1f0bf95a8a6e19a486ab84544436816269321aad05b4308`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E43	5652 bytes
`font_01_sfnt_off00006163.bin` `348cf943ac234a7dc4dd6595668ba9125b61eaeb1de3349f63291b0e5d1079e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6163	15480 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.