Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f087f89dee5ab3…

MALICIOUS

PDF

46.4 KB Created: 2020-08-24 06:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc97e92fac119af8725066401dbc600c SHA-1: 4c3aeecb899189b8a3ae4a338386abef729c9ad9 SHA-256: 14f087f89dee5ab3a2c85f30757466a284aaf29c40dc0477c0f73c0f6852f8c3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body also contains a URL that appears to be part of the redirection chain. The presence of numerous external links suggests a link farm intended to drive traffic to malicious sites.

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=song+amapiano+baby+are+u+coming
    • http://nevulejaj.nonfiction-ninjas.com/uploads/1/3/1/0/131070450/lufisoxibiriw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/6189/8390/files/pamiduvuguxejopon.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/46556383186.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/wuvugonegijoxaxotomukepap.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/91109246678.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/autocad_commands_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0434/2379/3308/files/86918625143.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/analytical_methods_in_conduction_heat_transfer_myers_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/raveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vepotarinaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/zumituzefuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/7596/6878/files/zoxopenawimoxefawuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/79034205910.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006387.bin
820c19ed79b33d4540f3f6dd7714de0e9d2e6cb060e7b883d6021dd04876c4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 5940 bytes
font_01_sfnt_off00007750.bin
b2171fadbe27cfccca013f9edcfa84aff82e86a377691b3e778e48f1157123c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 5388 bytes
font_02_sfnt_off00008990.bin
da57b999dc8541e51bd675b3204ad82790e27bd7adf4095e2d951fb4e8ad423f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8990 10288 bytes

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