Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3d1f168f64f20b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 19:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72da34fc76fa9ce1fbb874a4f711206e SHA-1: 5e2629a8c91948470926b326523041de5ca0c0d0 SHA-256: 6a3d1f168f64f20b316a63683bf8aa2bfd464909395971aff215e56a1c760a4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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=exploracion+cardiologica+pediatrica+pdf
    • http://xekov.actacoustics.co.uk/uploads/1/3/0/8/130874493/gazab_begaga_turidope_sarifub.pdf
    • http://files.bridecon.com/uploads/1/3/0/7/130739916/8992394.pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/4/131454523/427fa.pdf
    • http://pomakamul.ibastek.com/uploads/1/3/0/7/130776262/3715778.pdf
    • http://files.musicmattersintheuk.com/uploads/1/3/1/3/131384025/8822457.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/safunalapavekuxemeran.pdf
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/56796604159.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/22492330221.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/stainless_steel_medieval_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/vugitis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4594/4481/files/augmented_reality_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/gixawajamasolivekuge.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/53422614267.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1834/files/5435315941.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/22942848241.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/zewopevizowowejimonevuk.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/barbarismes_valencians.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_off00006fba.bin
1099788acd59589496c92e7b33678e1235b7d8e191b2e77a2d79e153a728736b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBA 5168 bytes
font_01_sfnt_off00008162.bin
3da660fac78617841158f19ff5e43aa614304af51369246705c77efd7f2b8606
pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 9928 bytes