Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e593e8840fcccf…

MALICIOUS

PDF

51.7 KB Created: 2020-08-08 06:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7c1e9ae3e91342db7cb37edd3f6275 SHA-1: 064bcfc1aa6fb44242de60888d0f881c944b947c SHA-256: 75e593e8840fcccf02e68b372b2150c5be658e1432bff5043f7ecb213e3abc97
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into clicking the link, leading them to malicious infrastructure.

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/wb?keyword=fish%20post%20harvest%20technology.pdf
    • http://saralakaz.bluepansycottage.com/uploads/1/3/0/8/130874284/fufefitadebowobefuk.pdf
    • http://rewiwow.theshadowagency.com/uploads/1/3/1/3/131380600/wexiranot-rokusamo-gamaz.pdf
    • http://files.sascwa.org/uploads/1/3/1/4/131452876/6923610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/lufilolinijozogobegod.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/19th_amendment_to_the_constitution_sri_lanka_sinhala.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/60881244553.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/39284394211.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/colombo_tourist_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/kutomogolujenadikes.pdf
    • https://cdn.shopify.com/s/files/1/0436/6319/6310/files/lifezewatutikof.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/75617566319.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/brainstorming_method.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/21178035131.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/sawopusatumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/anatomia_de_la_carotida.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_off00008c4b.bin
79c5cd56d17717b3b89676b13ff5efe84ed53720f2b154921be88d3a394f5ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 5564 bytes
font_01_sfnt_off00009f4d.bin
0728d57ecf0541ac89c6dd84268bc378b9efd595750770642f0ef9954956f892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4D 10076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.