Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e777759466a6c3d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-10 13:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef34d9549d6f14abf400c3ab6185be8a SHA-1: d25c363ecb146a3681b9ee0f2519e317510444de SHA-256: 5e777759466a6c3dc43f87fd982d1efd9b77fa669c932103236d18eee361860c
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as a marriage biodata format, to a link farm. One of the primary links directs to a known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded links suggest an attempt to redirect users to malicious content, likely for SEO poisoning or to host further malicious payloads.

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=marriage+biodata+format+pdf+free+download
    • http://files.hareloomupholstery.com/uploads/1/3/1/4/131454221/a13b2bf742f5c.pdf
    • http://mawafamex.reggaeclassictouch.com/uploads/1/3/1/1/131164250/ruxepapofebete.pdf
    • http://files.activebizsystems.com/uploads/1/3/1/3/131384301/1182694.pdf
    • http://files.mathewvieira.com/uploads/1/3/0/7/130776481/d5e45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/rerunidamiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/72986958549.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/times_square_earthcam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90278046640.pdf
    • https://cdn.shopify.com/s/files/1/0436/8714/9733/files/gill_sans_font.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/xowunixizome.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/34159358101.pdf
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/dipovuzidewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/pajuvoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/kubizivonawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/jilaxemegawematelab.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_off00007c21.bin
05f7de1a79284a936861b3f2b0c888b75402a61e0769e7cd01e7e2c18b3516af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 5420 bytes
font_01_sfnt_off00008e91.bin
eed4881631b6e7d8ef8f0e800a6d0a2a38d08fd2343c04660225f07217b5e142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E91 10184 bytes

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