Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e4395a59ffbfda…

MALICIOUS

PDF

45.1 KB Created: 2020-08-11 05:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63001bc1e3abcdfc739e13d404c444bc SHA-1: d4c96511019c71c01cb219802bef2427172e4909 SHA-256: 62e4395a59ffbfda558b313d582968e367148ede799ac27b59d906ebf81836df
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to 'carcassonne expansion 7 rules'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

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.cc/pify?keyword=carcassonne+expansion+7+rules+pdf
    • http://files.fresnonutritionsolutions.com/uploads/1/3/2/6/132683111/9806049.pdf
    • http://zokojami.stpetergreene.com/uploads/1/3/1/3/131398097/9e2d2448.pdf
    • http://files.ochea.net/uploads/1/3/1/3/131398334/foduvufu.pdf
    • http://files.midsouthflute.org/uploads/1/3/1/3/131398324/moniguzeweba_sanirodigasolaj.pdf
    • http://files.nordiceugenics.com/uploads/1/3/0/7/130738534/3957933.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/dejeniwazojukunotak.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/zefebil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/application_of_differential_equation_in_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0449/0254/7611/files/ncert_biology_class_11_new_edition_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/wekixokajuruvutesopepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/arrays_in_c_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/zasovolagukalesafitifuram.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/2_week_schedule_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/kixewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/84597263722.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/aperturas_de_ajedrez_explicadas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/33067318452.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/jipebotadelolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/49408322495.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e95.bin
2d5693faec2169ce01974ce559250673c4a6402bbfc7b49e361f6d689d65b8a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 5200 bytes
font_01_sfnt_off0000805a.bin
96304a26f7b5d07ad4b848e83c34882d08d19d653ae9ccedee6e0b2a87768fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 11820 bytes

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