Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f5dde4284902d8…

MALICIOUS

PDF

51.0 KB Created: 2020-08-22 21:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ebda4377c0898d7005c806ba9ae480a9 SHA-1: 1536b266583a70fa68bf9c61f43e881f7b0aa252 SHA-256: 78f5dde4284902d86363e71b6f217207d8b29c2e88e4a8e8e8104337ef909357
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of multiple PDF links suggests a link farm or SEO poisoning attempt, aiming to drive traffic to malicious sites.

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=galvanized+sheet+metal+roll+lowes In PDF document text
    • http://bedaxe.mainecoonselfie.com/uploads/1/3/2/6/132681670/7394781.pdfIn PDF document text
    • http://files.vizadvantage.com/uploads/1/3/0/9/130969700/8fa0f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/67829120958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/druid_shapeshift_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/51901442688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/bomupejakikega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/zaludupukavawatamet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/xafanenaravarifesesireba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7502/1474/files/tisoxaboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2149/9548/files/abecedario_latino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/69582413191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/81242330896.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 5088 bytes
SHA-256: bd9c48171f947636ba56803309ec5e2869996bdcfa8e45dcf3aab08642961776
font_01_sfnt_off00008454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8454 14116 bytes
SHA-256: 02ea4fc162ca338c78e7e390e69de422114301ba3f519d4c09f27a9bafa2fda4
font_02_sfnt_off0000b0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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