Malicious PDF — malware analysis report

Static analysis result for SHA-256 176036612cb82a65…

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 18:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c3468982e8d34dcaf309997d63436b6 SHA-1: 59abe2a5f031f9c79d026e18aa2e69b40666538d SHA-256: 176036612cb82a65a01d6cc72212f0f66b9e060bc38885f31817865bbc102ad6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same URLs. This suggests the PDF is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific execution chains.

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/pify?keyword=popular+piano+duet+sheet+music+free
    • http://xuxole.nenevalleydragons.org/uploads/1/3/1/4/131407089/6522637.pdf
    • http://files.fraserlegendsfishing.com/uploads/1/3/1/4/131483305/vebodavu.pdf
    • http://files.elyriadev-center.com/uploads/1/3/1/4/131406149/wurupedivu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/81733925903.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/89424225968.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/63716303735.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/13480778634.pdf
    • https://cdn.shopify.com/s/files/1/0454/2434/5244/files/bajrangi_film_song.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/lipokufedepar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/tupirosagunopiwedelerora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/88447026492.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6777/files/amazing_bible_timeline_with_world_history.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000589e.bin
17bdf051bf1cef0c13d2789c43b0d7e4497feb4be8f19bf3e6470c93d596809c
pdf-font-stream PDF embedded font (sfnt) at offset 0x589E 5396 bytes
font_01_sfnt_off00006ac1.bin
295c1ff1df599da258f6f7cdc020a7d15b215ea22499852b781474bdbd82c35d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC1 9920 bytes