PDF malware analysis — malicious · 5ec3bc7c810bbd3b

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 01:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2764fb6d1beca22e50f438a4e9ee1c2 SHA-1: 9c63a45be509efa194a9dc37dd23db43b000d17b SHA-256: 5ec3bc7c810bbd3b22ee5371db289c456eed791fd8ef34d659aba241aeca678d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a known malicious redirector, ttraff.com, disguised as a grammar worksheet. The document body and embedded URLs suggest a phishing attempt to redirect users to potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple external links further supports a malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=fiche+grammaire+crpe
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e2b09b_73cda8f06fec47fe8630a4c28f14d4a8.pdf
- https://static.usrfiles.com/ugd/b8c837_b3118e2f9e9b4b358d7ff7f947133adf.pdf
- https://static.usrfiles.com/ugd/83b1b3_130868759899434b98445633725da196.pdf
- https://static.usrfiles.com/ugd/b7ab08_a92bc967b06348529a8a6dc0a4eadfc9.pdf
- https://cdn.shopify.com/s/files/1/0430/7727/1716/files/31426735644.pdf
- https://cdn.shopify.com/s/files/1/0434/5970/7037/files/90951879561.pdf
- https://static.usrfiles.com/ugd/b8c837_fae4bc71b46c44b0aae9655d242d7e39.pdf
- https://static.usrfiles.com/ugd/e2c6c1_9ba98724df42407fa90432e1632db358.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/
- http://scripts.sil.org/OFL
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005aca.bin` `7107b702f4189cc3d1b16224710d478384288029158ee0f92543f67132810524`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ACA	5092 bytes
`font_01_sfnt_off00006bfa.bin` `52cd675185f696d600bf8148d91aa689bd0668697e7e37f6d0c253fb0f9e9e9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BFA	12088 bytes
`font_02_sfnt_off00009314.bin` `028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9314	16312 bytes

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