Malicious PDF — malware analysis report

Static analysis result for SHA-256 04152bfa9892cad8…

MALICIOUS

PDF

37.1 KB Created: 2020-08-23 05:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fa9c76618c2a277a80fb426b2dce292 SHA-1: 6d8501b2a34d53d8c2d5e8f7779235a57748f3db SHA-256: 04152bfa9892cad8299e80160455ea79e89f897dd0f54049811694a7d568eb69
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=ceremonious+three+font'. The document body contains obfuscated text and URLs, further supporting a malicious intent to redirect users to potentially harmful content.

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=ceremonious+three+font
    • http://files.honeygirlflowers.com/uploads/1/3/1/6/131636725/xesutoselapa.pdf
    • http://files.bittermallow.com/uploads/1/3/0/9/130969446/wexunonisinuwag.pdf
    • http://wozugefuz.edwardfanphotos.com/uploads/1/3/1/3/131383483/ruwuv.pdf
    • http://durusi.ericbagwellart.com/uploads/1/3/2/6/132681559/7033242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/biochemistry_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/wawiruvuxowebit.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/5251612410.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/xutopawasiboriguzivo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/learn_python_the_hard_way_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/mckinsey_influencer_marketing_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/baofeng_uv_5r_plus_manuale_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/28465225897.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/kofarulerakilajenusotam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/37146579450.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/73050807051.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/61919561837.pdf
    • https://cdn.shopify.com/s/files/1/0434/9729/1941/files/advocare_24_day_challenge_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/web_design_templates_css.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/56855406752.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_off0000494f.bin
334dae60bfbc572ca40a7fb6aef8ae2c8ef454c5e7e0e2da7f42ec1cadf5dc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x494F 4672 bytes
font_01_sfnt_off000058fe.bin
00ccd25841c7d7d0e48449a1599fee0c6907281ba1c9e0008a2ad888d5d40c38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 9428 bytes
font_02_sfnt_off0000794d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794D 4324 bytes

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