Malicious PDF — malware analysis report

Static analysis result for SHA-256 10913d1086531eb6…

MALICIOUS

PDF

59.9 KB Created: 2020-07-29 17:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196e000c2d849ad9d7d933c9c07b1b8d SHA-1: e002a957e325e2d7d8947b2f41ef634cf66dcd85 SHA-256: 10913d1086531eb65c8b2813f6cb7dcf79a968e9607d662c7e252340776d377e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'public finance regulations 2020 tanzania pdf'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

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=public+finance+regulations+2020+tanzania+pdf
    • http://files.blueovalboneyard.com/uploads/1/3/1/8/131856852/2512076.pdf
    • http://files.lisaharrisyoga.com/uploads/1/3/1/4/131452842/zapemixeragi.pdf
    • http://files.amtboats.co.uk/uploads/1/3/0/7/130739369/ddaad202afb0a2.pdf
    • http://files.tubitospizza.com/uploads/1/3/1/3/131384636/753891.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/wizuledogilibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/84029205205.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6608/files/dafap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/24001639891.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/sulifami.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/vuzonera.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/biviro.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/39632795320.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/36949415230.pdf
    • https://cdn.shopify.com/s/files/1/0439/0063/3243/files/17320114878.pdf
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/xajubotowovuvo.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_off0000abae.bin
1c0871307709a00827aa4643493a497cf5ef3ed6b05aadafb3032d881ea18d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xABAE 5672 bytes
font_01_sfnt_off0000befa.bin
93bfb8b27167197e5f462fda1858c29e56da36379b29cd0de1f1206b45e8afde
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFA 10208 bytes