Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9f9ef67b92d9d7…

MALICIOUS

PDF

45.5 KB Created: 2020-08-10 07:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9d648452124cc9b4f0e89c84b0a19a SHA-1: 36b3e8c57dd7575ad85236007804b84c413b5681 SHA-256: 1e9f9ef67b92d9d740fa60c99e03ac6746c558eba7f689402461f81a8a915616
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=maniac+magee+pdf+questions' which is a critical indicator of malicious redirection. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/pify?keyword=maniac+magee+pdf+questions
    • http://files.mountainmanperformance.com/uploads/1/3/1/6/131607010/sojifukafazalob_wimisovoki_fobenoxa_danidobizajas.pdf
    • http://jalovake.ederbeanfaceart.com/uploads/1/3/0/7/130775934/deduzubo.pdf
    • http://files.amredco.com/uploads/1/3/1/8/131871785/a9ae2987c3c.pdf
    • http://files.topenergythai.com/uploads/1/3/1/8/131871424/38e9682bab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/hydraulic_pipe_bending_machine_mini_project.pdf
    • https://cdn.shopify.com/s/files/1/0437/7909/6728/files/jubiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/bawuluzirivuxijelipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/bluebook_uniform_system_of_citation_20th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/85239126416.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/operational_amplifier_characteristics_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/vivufunixodudenejonid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/vibidodajazonak.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/mind_on_statistics_5th_edition_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/aws_architect_certification_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1589944702.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/55200875512.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669d.bin
9d4b8e913071c5fc4753352dad3995d4fe853b2bb5d96cde23df58cfee0c6032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 5360 bytes
font_01_sfnt_off000078bf.bin
b77bebcd966a36ce4840ca48ce77081b8a1b1873b26dd9526ffc37ec74908f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 9980 bytes
font_02_sfnt_off00009adf.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADF 4324 bytes

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