Malicious PDF — malware analysis report

Static analysis result for SHA-256 6094e58087a6410a…

MALICIOUS

PDF

48.7 KB Created: 2020-07-27 18:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e16fd65caa4de5d84bd1ecb4c401104 SHA-1: c6aa944856f8ebe04cca3b955f7b9f19d7fc6790 SHA-256: 6094e58087a6410a697ee297cfa06216c66400ee7deed0998f61d214993074ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector link, indicating a phishing or scam attempt. The embedded content, though heavily obfuscated, suggests a lure for a 'classic media player for windows 10'. The ML classifier strongly indicates maliciousness, and the redirector URL is a high-priority indicator.

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=classic+media+player++for+windows+10
    • http://files.rvmulch.com/uploads/1/3/0/7/130739062/gulusuzewonew.pdf
    • http://files.jakegrahamphotography.com/uploads/1/3/2/6/132696155/popekuwuk-nanudetirava-zigomevu-morix.pdf
    • http://files.scaffolddawgs.com/uploads/1/3/1/4/131438308/wanugun_nuranula_juforoxirup_xigevobekep.pdf
    • http://files.modestochristian.org/uploads/1/3/0/8/130814216/1952962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/71464844332.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/kukuduvawolulalavegexutip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/bopugekajotujurelalokiber.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/xipazometasuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/wubagorutinutekezokupof.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/12681181068.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/zivixevasewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lubogalevomiwubojaxijafax.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/matotetorow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/18113944639.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_off00007650.bin
c792425786abca742f8aaf00e1a4cca2e12a56a6790fa842b355af44aab09e77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7650 5420 bytes
font_01_sfnt_off000088b7.bin
1ffd2d9ab1cac81170e42cdc74be819dc76bbfa029d2a774af92f259a0b54573
pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 14116 bytes