Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe1f10848f0c277…

MALICIOUS

PDF

40.0 KB Created: 2020-08-13 04:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14d287d95e7beb86667277ad60844db1 SHA-1: 95cf308ed5e58c54fa03d1c2fe40171e416ea07e SHA-256: 7fe1f10848f0c277844dd673c5ba3efab561bc4d2d8aac5d2b59d44c9bb41298
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests a business context, likely a lure. The primary attack vector appears to be directing the user to the malicious URL, which is likely part of a phishing or scam campaign.

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.com/wb?keyword=business%20quotation%20letter%20pdf
    • http://vimego.fitnessisfreedom.net/uploads/1/3/1/3/131383483/4453074.pdf
    • http://files.cameronnazarene.org/uploads/1/3/1/8/131871871/vegemigaguwiwez.pdf
    • http://files.readyforkevi.com/uploads/1/3/2/6/132682913/dipuwanoritagu.pdf
    • http://files.cbweis.com/uploads/1/3/0/7/130740252/dadijerusovilij-kepago.pdf
    • http://files.mystical-studio.com/uploads/1/3/1/4/131437919/16db7c960a6830d.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/microplastic_pollution_in_table_salts_from_china.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/77560907085.pdf
    • https://cdn.shopify.com/s/files/1/0437/6920/0791/files/gilozisodasigugujumaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/15322076914.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/tipos_de_temperamentos_y_sus_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/fasivijejupujumezobafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/riraguronukotasef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/tigovimeduzejamobuxak.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/67408798075.pdf
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/2975562373.pdf
    • https://cdn.shopify.com/s/files/1/0430/2539/9962/files/xububizexakodoxir.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006034.bin
815d14f7605e332c2c0de3afcb1278d6a9a4fe64a473766dcd50d184a3b986df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 5212 bytes
font_01_sfnt_off000071ef.bin
c8f02fdcc0e8a1144231e635126a14b0331fecaa45c98277404d82c932a9d4b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 9884 bytes