Malicious PDF — malware analysis report

Static analysis result for SHA-256 4499b48bc2d8709e…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 15:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8594b1856cbcd8a31f1e3606cef6239 SHA-1: 5507c62f959ab2460e696a839a7d257df3015073 SHA-256: 4499b48bc2d8709e7aab601dc1fc54161496e9b3344250533cd7296f0c91ed50
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'computer parts' and a URL that mirrors the malicious redirector. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=computer+parts+full+form+pdf
    • http://files.pmmusp.com/uploads/1/3/0/8/130813846/piwak_vifimadefi_talibuximi_zibagowad.pdf
    • http://dugelawav.thecooleygallery.com/uploads/1/3/2/6/132680903/nikupi.pdf
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/63640736169.pdf
    • https://cdn.shopify.com/s/files/1/0435/7678/7103/files/enlightenment_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/lotigutijavabigozorabe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1904/files/votovexesaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/rotafokalegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/nationalism_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/36613240683.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/99672328184.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/butefajafixaweti.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/adalat_10mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/27588497357.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dda.bin
bc3e000dce65bb9b4b8a4b687998c463a870f4dd6c062f507d3769cfb8d01c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 5092 bytes
font_01_sfnt_off00007f08.bin
743445140ed1052de442a2d0dc7287fe55b2eca841e61530f9c1e2b6b78dc9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 13904 bytes