Malicious PDF — malware analysis report

Static analysis result for SHA-256 033e48ed848c6e3e…

MALICIOUS

PDF

57.6 KB Created: 2020-08-10 16:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196a25786e92d2914db2a63bce2b23d4 SHA-1: 6e433778493970ce15d6aef0c9fc3eb3bd498add SHA-256: 033e48ed848c6e3e87b0d4bfc34b1d2b3bbe012e14aba3671f2aca0c392452c0
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that masquerade as legitimate content ('Vocabulary for ielts speaking pdf') but redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=vocabulary+for+ielts+speaking+pdf'. The 'PDF_SEO_LINK_FARM' heuristic indicates the document is part of a larger scheme to generate traffic through numerous external PDF links.

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=vocabulary+for+ielts+speaking+pdf
    • http://files.bryanaduley.com/uploads/1/3/1/3/131380786/1258063.pdf
    • http://files.travis-wayne-goodsell.com/uploads/1/3/1/0/131070161/6283807.pdf
    • http://files.philipellisconductor.com/uploads/1/3/0/7/130776490/sepixos-sepesapefunesu-xefow.pdf
    • http://files.scuttsdrivingacademy.com/uploads/1/3/1/4/131453990/vajalisolore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/rezopufonumabum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/5606389990.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/93227189572.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/ludizoxufibib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/suluwas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/ntsb_aircraft_accident_reports.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/21126705344.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/67359385212.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/4766051859.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fdc.bin
88004d95cc5027fcfd877b835470b57dd7b382889bb2eb7f85ef35f507c9bf27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDC 5476 bytes
font_01_sfnt_off00009288.bin
c98e1c95783730d0d446f4ef906ed6f3e0b40b6e9f8c7ca70f5234aaa070bd69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9288 10260 bytes
font_02_sfnt_off0000b5ca.bin
53c3abcf66c58accd900cee7d40916a2ac5e58f51d938455de4a5c6ee6b2d221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CA 16120 bytes
font_03_sfnt_off0000cab9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB9 4324 bytes

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