Malicious PDF — malware analysis report

Static analysis result for SHA-256 6779036b32312981…

MALICIOUS

PDF

42.3 KB Created: 2020-09-10 03:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80a754225224cbc9d18e13570ea0e906 SHA-1: 0f1f486924bb42cec66c4c1bb983fabf256c6211 SHA-256: 6779036b323129813b5c6108ecc0823b6a6b83d96a6c72c8f474c9076a333820
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. The document body also contains a URL that appears to be part of a link farm designed to lure users with keywords like 'android games free'. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to obscure malicious links.

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.link/pify?keyword=android+games+free++play.+mob.+org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/kivuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/6032326216.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6497/files/analytical_chemistry_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/mawikowiguxako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mudamizoxudaxusuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/bmw_suv_x1.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/kirixakadenekaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/insurance_and_financial_market_awareness_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/kijexijetulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/17505647902.pdf
    • https://cdn.shopify.com/s/files/1/0439/1983/5304/files/ejercicios_de_fracciones_equivalentes_para_cuarto_grado.pdf
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/kizovepebirelawerebas.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/76051948678.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/47056865239.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/mutovipoxewoveliwik.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8530/files/rudamedon.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/financial_statement_analysis_benjamin_graham.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ce.bin
f59565d2226118db73285984432930bff5326fcc7807ad09f4d0c12fe4281472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46CE 5332 bytes
font_01_sfnt_off000058d0.bin
869a0d6137aba7dd1467653e8e5965b9312fd6361cdad2055b35064f16803811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D0 9320 bytes
font_02_sfnt_off000078d6.bin
5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 16068 bytes
font_03_sfnt_off00008d7b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7B 4324 bytes

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