Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a29efb24aa58aa5…

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 23:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f92c683637722ae0e7d069794fdfb8a SHA-1: 8ce6fb246e15864c60f7b08fbecc057d82acde1f SHA-256: 0a29efb24aa58aa5471d6712d38a187a13e8ec5001b20cf67cdf759d0eb8b06b
170 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body text and heuristics suggest a lure related to invoices or downloads, intended to trick the user into clicking the malicious link. The presence of many external PDF links also indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=fixed+assets+register+template+excel
    • http://files.bankslawyers.com/uploads/1/3/2/6/132695360/e7f062.pdf
    • http://files.cambridgenurseryschool.org/uploads/1/3/0/8/130814308/fa52f8e8cb2831.pdf
    • http://files.kickkim.com/uploads/1/3/1/8/131872238/vezalakore.pdf
    • http://files.indiefilmontario.com/uploads/1/3/0/8/130813364/8295980.pdf
    • http://tajan.tacfitsolutions.com.au/uploads/1/3/2/6/132680839/ba46f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/1981236584.pdf
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/annotated_atlas_of_electrocardiography.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/41170575998.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/rovenga_aarsh_benipal_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2759/3376/files/dimensional_analysis_chemistry_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/xebatojufefowesidixejenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/viremowapipaxunemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/50755524661.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8217/files/youtube_to_ringtone_iphone_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/alienated_labor.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_off00006099.bin
050b5093a9e09c5b5ce8fe3f6bc460728f78d3ae95ffe5c880c0d97b4d4cb717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 5416 bytes
font_01_sfnt_off000072f2.bin
6e0600cea6c019376edf9e87626bce533cfbd5e43201c804fc7603d974905510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 12596 bytes

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