Malicious PDF — malware analysis report

Static analysis result for SHA-256 16791e287f1decb2…

MALICIOUS

PDF

41.2 KB Created: 2020-08-15 00:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5820a9d1fff38a15b81efea4f76d79 SHA-1: a051090267c1a38a3b8a70fd699a7123fc7f5f1a SHA-256: 16791e287f1decb2d617cc83465a1d96d84e05f9304fbd2602414a8f6d5fd021
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 external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=balance+sheet+vs+income+statement+time
    • http://files.bespokecabinetworks.co.uk/uploads/1/3/2/7/132740399/2749473.pdf
    • http://nopari.casa-julip.co.uk/uploads/1/3/0/8/130814761/tagowatidu-nemopunasazuba-timajolo-torut.pdf
    • http://files.garagethirtysix.com/uploads/1/3/1/4/131438538/a587a66416.pdf
    • http://dirimita.nationalroadchurchofchrist.org/uploads/1/3/0/9/130969329/b3b37c6b7e6acb.pdf
    • http://files.banningchiropractic.com/uploads/1/3/1/0/131070161/rofoxopi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/4840950318.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/javelin_range_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/4432/2978/files/sadufalazigafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/40255701517.pdf
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/15766502002.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6065/files/calendario_2018_con_festivit.pdf
    • https://cdn.shopify.com/s/files/1/0436/7751/5941/files/introduction_to_batch_file_programming.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/9513978907.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9911/files/haynes_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/1376184108.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7192/files/add_text_into_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/3838/1992/files/79780184090.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_off00006446.bin
c258038527e1cac0e316d3d9bb6178e44fe152e14cf620fab08626ca37df63d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 5052 bytes
font_01_sfnt_off0000754d.bin
3bde38e864d66aa8c0cfd404d3db5a455d89749b23245844dedae18543375a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754D 10284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.