Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c096afb6126e83…

MALICIOUS

PDF

54.2 KB Created: 2020-08-08 08:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07554e9503dcadb71921b009a74a525a SHA-1: e24aad2a2dd6d50380adf26907861412c9325058 SHA-256: 73c096afb6126e83467793f0d7365c1db58903e6d59aca7edd47a7c92c3ef2ab
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title related to mental health definitions, but its primary function is to host a large number of external links. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that one of these links, 'https://ttraff.com/pify?keyword=mental+health+definition+pdf', points to known malicious redirector infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to generate SEO traffic by linking to numerous other PDF files, many of which are hosted on Shopify. No scripts were extracted from this sample.

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=mental+health+definition+pdf
    • http://files.ameenayoub.com/uploads/1/3/0/8/130813558/delizadefotewi-nudojefut.pdf
    • http://files.hecmaconference.org/uploads/1/3/1/4/131438313/naxaxuburuterop-motuje.pdf
    • http://files.singingdaniel.com/uploads/1/3/0/8/130873851/39c74.pdf
    • http://files.restorenorthampton.org.uk/uploads/1/3/2/3/132302894/61359252c4.pdf
    • http://files.maahomestead.com/uploads/1/3/2/8/132815791/suroz-punofubalu-gibinon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/juzored.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/sepotujizevab.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/jotipaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/sqlite3_create_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/tatugemovapod.pdf
    • https://cdn.shopify.com/s/files/1/0443/9392/2726/files/best_app_to_annotate_on_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/pixibolanaxejuwuxigusobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/69305393884.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/35604705670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/suikoden_2_strategy_guide.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_off00008985.bin
7617a75486ffc2646499acdd2db8f49b6d70e183bc714697b7a80367cf294df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 4648 bytes
font_01_sfnt_off0000994d.bin
b2a2f3b8baf9c9e63cf778b7b7769a1fd849e9090a1ba2a48973eb3b65e5dfcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x994D 10616 bytes
font_02_sfnt_off0000bdad.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAD 4324 bytes

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