Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3e154c0e03b467…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 05:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c9f7d9a644ecfc4ec4a8dcf8e2940f SHA-1: 3097517277ef8ce2e320a24d969cb5a1f72df50b SHA-256: cb3e154c0e03b467018f336b135c3de06f63169009baa2c9d7377ce37c5114fa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with the primary URL `https://ttraff.ru/pify?keyword=forgotten+shore+map+neopets` identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=forgotten+shore+map+neopets
    • http://files.holisticcoachsg.com/uploads/1/3/1/4/131453902/d2667b18e0b55f3.pdf
    • http://files.fabellamusic.com/uploads/1/3/0/8/130814043/pololowaf_wawetosifaw_meginoburoma_nunuvomulezedos.pdf
    • http://files.pptraining.org/uploads/1/3/1/4/131407709/1573366.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/12615556279.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/acog_preeclampsia_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/91361463977.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/76700650112.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/penububuxexoxij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/satonebama.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/xawuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/nidusezozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/15319487486.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/kavibed.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/mukimogawipuvimamopiduzor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/nunorunegogowalonubok.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.

FilenameKindSourceSize
font_00_sfnt_off000062fd.bin
942678903e67d5f43ec0e896570aac528700153263fd3e05c171c2591426daee
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 5156 bytes
font_01_sfnt_off00007463.bin
50a575d02e8bd4d4b6d91cc019b35a6ef15aede0390f8c43be1a2191eef08769
pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 10256 bytes