Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f2baf07ac329fe…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 20:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ec66f70a5d73356cfcc2543f3414a9 SHA-1: a6ba4224d72e60ee7850fc634d77a2ff5ab906a5 SHA-256: 01f2baf07ac329fe86997924d3d4c6d4982744fd404a43a40c5c2b7495f60dcd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The presence of a large number of external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=glucose+alanine+cycle+pdf
    • http://files.eternalskytravel.com/uploads/1/3/0/7/130739986/837010.pdf
    • http://files.mishidance.com/uploads/1/3/2/7/132740408/jolejo_sakipoz_xakarezivuxonu.pdf
    • http://files.mdesignslincoln.com/uploads/1/3/1/4/131453684/tagofebodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/rimas_y_poemas_gustavo_adolfo_becquer.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/84402858513.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/resigomikosisuregag.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/ielts_academic_reading_practice.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/desuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5846/1863/files/brother_sewing_machine_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/83657252291.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/gilekirotitubavadoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/atraumatic_restorative_treatment_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/danadufajusuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/84906648821.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/wazozaxebepiziw.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_off000064ed.bin
874b85a647da7d66e66bfd35664d458a4e1e483034c715dac8b081d57102b214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 4988 bytes
font_01_sfnt_off000075fd.bin
1b67bcc054faa1ba956bd20801bddd468af377c46c75182fda301ccb42ce8857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 9940 bytes
font_02_sfnt_off000097fd.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FD 4324 bytes

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