Malicious PDF — malware analysis report

Static analysis result for SHA-256 750cfd641dfc0bf4…

MALICIOUS

PDF

48.8 KB Created: 2020-10-26 04:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9641927270c48189053a63b65a2862a SHA-1: 580c598698e8403cf6e2e88221c04c07250fe55f SHA-256: 750cfd641dfc0bf4a9dda94a1eaefa2fd2db61d85aa7587f4e23706f7c249c5f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://ttraff.ru/123?keyword=xiaomi+soocas+w3+manual` is directly associated with this finding. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=xiaomi+soocas+w3+manual
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/47a40.pdf
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/2138368.pdf
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/85e393d193dba.pdf
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5f90d67f784bd.pdf
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f8cba87c1573.pdf
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8a75f197110.pdf
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/5369362.pdf
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/tusiwisotoloko_dizofipa_nuxer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/nugelawubataworanapeva.pdf
    • https://cdn.shopify.com/s/files/1/0505/2671/6100/files/35_lean_tools.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/tannoy_efx_5.1_subwoofer_manual.pdf
    • https://s3.amazonaws.com/nowokil/dugiwetamaruto.pdf
    • https://s3.amazonaws.com/jifesu/87737843293.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007380.bin
fbbbf92b0e4e9b29af5d7fbb56d946749e2dc1e90ed88325d120391a792a7108
pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 4768 bytes
font_01_sfnt_off00008396.bin
718e94eb354ef175fe171ff8a12c978a6863b539c43d813f05a860cc02c91dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8396 10980 bytes
font_02_sfnt_off0000a89a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xA89A 4324 bytes