Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f880400d80adede…

MALICIOUS

PDF

49.1 KB Created: 2020-08-10 11:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f44ac4285cb0b04b754f8669c952edc SHA-1: 135506b6bd2c315cdefded815ddd685d9dfa4803 SHA-256: 6f880400d80adedea78225a214cf74fc2493ac2e351c7b75649c0053d68c0874
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 a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to act as a link farm, directing users to malicious infrastructure.

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=bible+history+in+telugu+pdf
    • http://files.ecogrowhawaii.com/uploads/1/3/2/6/132681513/wekufutese_gizorapo_vevajavemuk_xetesutumed.pdf
    • http://files.meganmurphy.co.nz/uploads/1/3/1/6/131606111/9083001.pdf
    • http://files.anxious-but-fabulous.com/uploads/1/3/2/6/132696174/kakumirebanave.pdf
    • http://files.hfesa2019.org/uploads/1/3/1/3/131380292/dizuto.pdf
    • http://files.theglassforeststudio.com/uploads/1/3/2/6/132680808/201515.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/luxuvasiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/kifopowidevavomovodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/47400331483.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/wiwim.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/ansys_apdl_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/59167697412.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/30053863865.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/26554264180.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/deed_without_warranty_texas.pdf
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/wukusaxururatujisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/85697737634.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/watasajoxapibopowelenug.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c00.bin
d83a0c7614b30150ddc110227bb085406f2506a7558fb385651dfc8903e2453a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C00 5264 bytes
font_01_sfnt_off00005dd7.bin
6061d72126ce2f783ace860002649661a6370009aec6e01fbe800e5506cfa55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD7 16536 bytes
font_02_sfnt_off000086d7.bin
6855ab6fad34bc622da58b4d5cea517e51c1d3299c6f8674b73cf84b3bcd42fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 10340 bytes
font_03_sfnt_off0000a8fd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FD 4324 bytes

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