Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b2b9a039f2b50d…

MALICIOUS

PDF

51.2 KB Created: 2020-08-09 19:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b60afd8dee54344dce16c720ef5d08cf SHA-1: d8c2056c43ab0b019dbca2a6a19be3bd49d7b949 SHA-256: 16b2b9a039f2b50d2eb3e9715a8d3e70dcb2d218ea8a7cae0bf0b86dad864c54
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 infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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=veterinary+microbiology+mcqs+pdf
    • http://files.sfandalusians.com/uploads/1/3/2/6/132681293/sazisetitu-tasodegirojojix-foxuma.pdf
    • http://files.matandnick.com/uploads/1/3/1/4/131452958/1486934.pdf
    • http://files.stevenkriegerlaw.com/uploads/1/3/1/4/131409677/7d7bea3d20.pdf
    • http://files.goldeneaglesweden.com/uploads/1/3/2/8/132814990/513790.pdf
    • http://files.paulbloomer.com/uploads/1/3/2/8/132814476/jamaxam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/96813667141.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/sleep_clause_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/lonomujukitumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/milwaukee_15_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/basal_metabolic_rate_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/fexuxiliniperojoxoziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/50141130193.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/xefixikudef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/mini_budget_2020_19_pakistan_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0455/6003/7541/files/nutritional_value_of_mango_fruit.pdf
    • https://cdn.shopify.com/s/files/1/0451/7367/0037/files/a_league_fixtures_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/kenuwediwozawipaxatopizit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/29594535182.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_off0000886c.bin
5d89c7fe2320349db98ae0c67a0a19d4d10ff8f5f210f378dbfb7c3590f30ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886C 5808 bytes
font_01_sfnt_off00009c1d.bin
7fc502a2e6455cc27137e546dbe8d0e3816c7b6982fb00143f8d29714c713f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1D 10440 bytes

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