Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b2a3845f05de45…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 10:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 582700f5192d83b71dd5966542710f44 SHA-1: 36de0e816dffeefafe5865053f1e5effc976a5bb SHA-256: 64b2a3845f05de452facb17af90b8c8788ce411cca7ce7ea1b9243862a856cec
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure malicious destinations. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bad+blood+livro+pdf, which is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains many of these links, suggesting a link farm or phishing attempt.

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=bad+blood+livro+pdf
    • http://files.edisonpto.org/uploads/1/3/0/8/130873798/mizokobowere-dugubigedaterod.pdf
    • http://files.yoursinfashion.com/uploads/1/3/0/7/130775834/1294901.pdf
    • http://files.paraglidingtalk.com/uploads/1/3/1/6/131606111/6551622.pdf
    • http://files.texasdas.org/uploads/1/3/0/8/130874058/3d39d42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/13358687341.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/divergence_and_stokes_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/how_to_disassemble.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/pufanosatudajoxijij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/mirofotenefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/cardiopatias_congenitas_cianoticas_en_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/17893174440.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/fanuc_robot_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/metabolism_reset_diet_alan_christianson.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_off00006117.bin
f1b18681b9445e22a9f988fd3589613d71c872f9e73a60173b1a41cb3d82c53b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 4588 bytes
font_01_sfnt_off000070b3.bin
6d20342efcb187fe8a9c4b0a9953ffd792c4c1dab4e335dea67e5da8d1b0cd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10420 bytes
font_02_sfnt_off00009462.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 4324 bytes

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