Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba3516c9151cf84…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 23:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c61082ac519ca82d07d9132c65d6d1 SHA-1: d36f0579ecef0d02fe50b123a32a3fff7eb3495e SHA-256: 5ba3516c9151cf84a85fab6b84e341ae2ebe8e54316a1e5ae1d37ed07f8e989f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for design templates, and a critical heuristic confirms the presence of a malicious redirector link. This indicates a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=interior+design+brochure+psd+templates
    • http://files.ksp-boutique.com/uploads/1/3/0/9/130968921/pibuxuboxew_wugerat_xisojemewebasax_gupugis.pdf
    • http://fosemido.hollandrunningclub.org/uploads/1/3/0/8/130813420/pigome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/8928783052.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/34526901972.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/xadewatulefikutabusad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/natebiliwawutolug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/46499542202.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/metro_map_newcastle.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/rokakidawikifefug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/kasozin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/anaconda_snake_information.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_off000066ec.bin
5da9da38ae1d41d15809bde40662851f832bf365de2bfdf8e2765c91f920063a
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5564 bytes
font_01_sfnt_off000079a6.bin
d68ca2795d31599c4f8d0465f84e700312459257319072e42e6a5f4b12d13236
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 12012 bytes