Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b528a0bedeef8a…

MALICIOUS

PDF

122.0 KB Created: 2020-07-11 01:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7c767a47d1888592865ac847ab3792e SHA-1: 04cccb02ab8a6b34bc078556715d8a9cfdcfa4ea SHA-256: 18b528a0bedeef8af00288b62b333e7c42db4cc41a33eb845bd6191dded004ba
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of these links suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

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=capnodium+sp+pdf
    • http://files.stitchmastersltd.com/uploads/1/3/0/8/130813923/4f5fc437a4.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://files.bhenergyshootout.com/uploads/1/3/1/1/131163976/7514162.pdf
    • http://files.megansbakeshop.com/uploads/1/3/1/4/131437981/ccc61b.pdf
    • http://files.fabfactoryaz.com/uploads/1/3/1/4/131438641/kifesavuze_mopuzegipulix_fijemowezukiguw_ralajajuk.pdf
    • http://files.practicallywholesomerd.com/uploads/1/3/2/7/132741433/zogepaka_bukeluditagu.pdf
    • http://files.heartofillinoisorff.org/uploads/1/3/1/3/131379371/9586210.pdf
    • http://files.nt-307.com/uploads/1/3/2/3/132302892/dac89e7ce2184ad.pdf
    • http://files.shadowoodgolfshop.com/uploads/1/3/2/6/132696080/9925377.pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wexowugo.files.wordpress.com/2020/06/15484011804.pdf
    • https://xudunonuv.files.wordpress.com/2020/07/79624658479.pdf
    • https://dupelutifor.files.wordpress.com/2020/06/babepavazosuti.pdf
    • https://zetigerut.files.wordpress.com/2020/07/noditofosatem.pdf
    • https://xobezamofud688134818.files.wordpress.com/2020/06/tugixodot.pdf
    • https://podanowusotu.files.wordpress.com/2020/06/33312228407.pdf
    • https://mazokotafon.files.wordpress.com/2020/06/zaxemuxagopilavitogap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/93607634997.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/ribinojulamazaremepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.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_off00019900.bin
adfb456b4a72c0f19501eb639003cc4b05855b0591dca9cf93bb38fc8d5941c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19900 4764 bytes
font_01_sfnt_off0001a90c.bin
0d5c2d7c19aea24b8f704d5ff3071c1617273af27931a356fcfa8e20441fe5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A90C 15976 bytes

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