Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3d144822e3be40…

MALICIOUS

PDF

54.1 KB Created: 2020-08-24 06:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf4c17b323a3a0e5adb7bd397a81258a SHA-1: 62140fbfc9c1effdab4f78b36374db8a4d33e9de SHA-256: 1e3d144822e3be4034fab6d2fa50d5306d8be481c54edab40b10ac701e825744
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=angular+formarray+display+validation+errors In PDF document text
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.pdfIn PDF document text
    • http://wotujetaj.andychristopher.net/uploads/1/3/0/7/130776485/razeb.pdfIn PDF document text
    • http://files.tropicsofhaiti.com/uploads/1/3/0/7/130776791/bimoloxi_galujaxa_mixuvevopedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7830/4154/files/69858381819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/xamoduvudapuguvobajimani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/bromic_chest_freezer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/83660562608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4591/2727/files/english_vocabulary_in_use_upper_intermediate_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/97447600321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/iifa_awards_2019_full_show_720p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/tejogijenamidufonexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9422/6584/files/vapifejodezitakiwosugala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/bmw_x7_photos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/kapasonaxigurob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/17972338647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/72231806625.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 5512 bytes
SHA-256: 55c716c51759ea7ec55b953bc6bcbc128ae2bb712984561bb3484e524c1eab3b
font_01_sfnt_off000094f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F2 16812 bytes
SHA-256: ca8586e847ff529478fe7814aede6b5e486b66981ba4c8e4421dce9ea7eb9e2c

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