Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e64c60b17e37ae…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 23:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ec80c15d1d940fa9ceb45151fc0353 SHA-1: 3ce52f3cf76e69816e8d4af8fe2d2a2884789cff SHA-256: 18e64c60b17e37aeaf97bb1d5fa80aad0b617ca1b617eac6663c3519af04a975
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.com/pify?keyword=partnership+deed+pakistan+pdf', redirects to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous links and the redirection to malicious infrastructure indicates a phishing or redirection attack.

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.com/pify?keyword=partnership+deed+pakistan+pdf
    • http://files.unityofheartfalmouth.com/uploads/1/3/0/7/130738719/varuvinetuzawonajuge.pdf
    • http://files.jaspercountytiochcommunityassociation.com/uploads/1/3/2/3/132303041/rekefunafovamaxise.pdf
    • http://nuwoluz.stresscafe.com.au/uploads/1/3/0/8/130873995/zagidag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/ct_drivers_license_check.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/skf_cylindrical_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/fire_risk_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/25408810446.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/21894638281.pdf
    • https://cdn.shopify.com/s/files/1/0435/4736/1439/files/love_marriage_vs_arranged_marriage_essay.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/mizudan.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/zerul.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/digij.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/campbell_biology_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8885/files/muvadoji.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_off00006823.bin
d85e4edc9e0033877e2666567a77f6bdd4977ec8f7f0f969cd5e58d3dc1dae1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6823 5164 bytes
font_01_sfnt_off000079ad.bin
16b424695c1296440a65411c6266cfc43a2520f695dd726740e04ee4706926e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 9776 bytes

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