Malicious PDF — malware analysis report

Static analysis result for SHA-256 0420d6f23633f63e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-13 23:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeca1909552c707e704433442fdd0476 SHA-1: 4d327cee6f1292fc50bf9148095b673c566b6b64 SHA-256: 0420d6f23633f63e42610249c8601dd373038e225c2d4f74c2f21a62737819a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user 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.ru/pify?keyword=formule+gaz+dioxyde+de+carbone
    • http://fapig.customerservicetalk.com/uploads/1/3/1/8/131857631/duwazavarinemos.pdf
    • http://files.jplinde.com/uploads/1/3/0/7/130739326/xujigogowogu.pdf
    • http://dozetoro.vanderlegal.com/uploads/1/3/1/4/131438641/ladex-wilojudinotij-vunibaxazizu.pdf
    • http://files.anabelaphotography.com/uploads/1/3/0/7/130775286/3612783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/1-_99_thieving.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/google_analytics_code_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/limevotuvawedodefizebel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56773010908.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/85173263352.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pupagek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/49521303287.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/wobem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/dowax.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/placenta_previa_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/aneurisma_de_aorta_abdominal_roto.pdf
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/vmware_license_key_free.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_off0000674c.bin
1d13d75badf638ab26bc10e161cea47f3e00afd8d6417dc038703c77144b1b1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 5396 bytes
font_01_sfnt_off000079a2.bin
c8dbd00ab3415babcd667824914c5245105db22ca4696000a336559e3924954e
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 11844 bytes