PDF malware analysis — malicious · 52d03d32b436de90

MALICIOUS

PDF

104.2 KB Created: 2020-09-09 04:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 129ad4f4212b12911eeae6d0a4dfdd88 SHA-1: e96532f9a2e5e106fb25bb29c200501e7efd1ddf SHA-256: 52d03d32b436de90eabfe1123bac4f4068a77ec898cfb1b2dbda5e32e8ffecee

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a medical guideline. This indicates a phishing attempt to redirect the user to a malicious site. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

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.cc/wix?keyword=pituitary+apoplexy+guideline+2015
- https://static.usrfiles.com/ugd/165585_4c3931afc64f411591f99ebc41d945b9.pdf
- https://static.usrfiles.com/ugd/b8c837_83a6177815bb45f1bf535570ea7ac4f8.pdf
- https://static.usrfiles.com/ugd/963627_c88c94856f2745fe8ce6950361d270b8.pdf
- https://static.usrfiles.com/ugd/d01287_2853b23dd70a434eb47d0151fc78c8ab.pdf
- https://static.usrfiles.com/ugd/97493d_eb60e372b4df44bf9849637016d4cba7.pdf
- https://static.usrfiles.com/ugd/003b86_9343c8fe5a0c4e90a4f02986b8207a55.pdf
- https://cdn.shopify.com/s/files/1/0436/2246/5699/files/morudutop.pdf
- https://cdn.shopify.com/s/files/1/0439/7993/1806/files/journal_of_atmospheric_and_solar_terrestrial_physics.pdf
- https://cdn.shopify.com/s/files/1/0434/0583/6438/files/42727216590.pdf
- https://cdn.shopify.com/s/files/1/0437/1464/2069/files/bexuxevanabuvinopuka.pdf
- https://cdn.shopify.com/s/files/1/0428/2561/3475/files/37544460496.pdf
- https://cdn.shopify.com/s/files/1/0432/2865/9870/files/zutatigixebonazofumave.pdf
- https://cdn.shopify.com/s/files/1/0433/4796/8149/files/chemistry_notes_form_1_to_4.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_off0001537d.bin` `924a4d826a3dc6777d49d73a7cfe8323ed2729c49d455d76484807916e28349e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1537D	5572 bytes
`font_01_sfnt_off0001669c.bin` `7a6047383b1242407bd30e11d8b4974346b2c93492113fc24bd65d7e30ef85e7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1669C	14372 bytes

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