Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e7c533d6722c4c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 01:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e449af5c9803ffc4630249c7240422b SHA-1: dcba67b1f98ae9a2b36a9ad734badab53198431a SHA-256: 64e7c533d6722c4c8fe74c85645abe185fd246a89daf6b321a45453bf86bd707
154 Risk Score

Malware Insights

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

The PDF contains embedded links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=immediate+resignation+letter+template+uk'. The document body also contains this URL and other links to PDF files, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=immediate+resignation+letter+template+uk
    • http://files.brandonstaebler.com/uploads/1/3/0/7/130739987/8411317.pdf
    • http://files.distinctwealthmanagement.com/uploads/1/3/1/4/131437535/fexijid_tomuvigamamuxon.pdf
    • http://xowituwa.equineinspired.net/uploads/1/3/1/0/131070604/suduwiximevosuvarumu.pdf
    • http://files.augustlite.com/uploads/1/3/1/4/131406086/pikowajexazug_jugudujikugi_kelupofeduwajoj_difuzagesavujuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/65344484171.pdf
    • https://cdn.shopify.com/s/files/1/0448/5015/1584/files/masterbuilt_smoked_turkey.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/air_waybill_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/fidujasimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/united_heroes_league_kenshi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/lekobewuwujafofoperepur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/the_martian_epub_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/24837500017.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/10415694147.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/engineering_mathematics_syllabus_for_gate.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/importing_dvd_to_itunes.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_off0000656c.bin
b977475a9c5634103f1f40b80f9bd6004f7192305ddb0ab7211fd50844602c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 5164 bytes
font_01_sfnt_off000076dc.bin
fb542d5480f0d033874f85a1daa057870d45526093df8c8a1987ba99e96d66a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 10568 bytes
font_02_sfnt_off00009ab9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB9 4324 bytes

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