Malicious PDF — malware analysis report

Static analysis result for SHA-256 101eb51dc7b397b0…

MALICIOUS

PDF

72.9 KB Created: 2020-08-19 23:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25c0e12c24f0d71bd063854c3865baf SHA-1: 9457dca7b3295df5b7f5674f6d89030c16782054 SHA-256: 101eb51dc7b397b05079164c22f2f412c81686f5ef398342617a8772e5383d25
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it's a redirector link pointing to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to direct users to potentially harmful content, likely for phishing or malware delivery.

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=international+public+relations+definition+pdf
    • http://levubi.asasmy.com/uploads/1/3/0/7/130775726/7008156.pdf
    • http://files.harrishomeopathy.com/uploads/1/3/1/4/131453214/6657346.pdf
    • http://wuxero.snowbc.org/uploads/1/3/1/4/131406390/1eb7c.pdf
    • http://files.monasfamilyemporium.com/uploads/1/3/2/3/132302870/5871365.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/revixixoxugonide.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/missed_abortion_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/diy_workbench_plans.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/13267128202.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/sony_icf-_cdk70_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/case_study_research_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/135328534.pdf
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/liste_ballaststoffreiche_lebensmittel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/jedamovojukin.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/vorikobugazatutepela.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/jizuvoganizafukupusatew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/56369456449.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0f.bin
42891f6fcdd97646580183d0b5fca99c3b3378697985a2bcebbf41695566aa33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 5224 bytes
font_01_sfnt_off0000f0cd.bin
5363fb2caed4fb7e227f6326bccf79f58cf273d36290c331461503a8d6f2a17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 10968 bytes

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