Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bf4acd66262d18…

MALICIOUS

PDF

39.2 KB Created: 2020-08-28 13:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55b51d6c6a4adc41d5238a4718835a68 SHA-1: 268d03135953bc6cff13578d0b0657b75d483911 SHA-256: 03bf4acd66262d181949e6029e4c78139cb9f5f70341330efe5da51b72031e6d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though garbled, contains a URL that appears to be part of a lure related to product information. The presence of a link farm and a critical redirector firing strongly suggests a phishing or malware distribution attempt.

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.com/pify?keyword=netgear+arlo+pro+battery+life
    • http://files.bizobike.com/uploads/1/3/1/1/131164002/pakubowosid-zovif-dolutaxajopezun.pdf
    • http://juzafuz.abergelebowlingclub.com/uploads/1/3/1/3/131398372/volotesira_kejupekujoguku_bozevokexe.pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.christianoutreachtools.com/uploads/1/3/2/6/132683000/000c335f5d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/have_you_ever_brandy_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9654/6216/files/makelijumosirewapara.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/sukebezepetatomigajixok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/nesimuzugojok.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/30136272633.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/sedapotip.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/woxumesozolibiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/93079723823.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.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_off0000544d.bin
c63b94723ac393fb25af34b9b8551adeeecc8312d997d18574d07ec7c84b1b7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x544D 5104 bytes
font_01_sfnt_off000065c7.bin
96b791333ba218be1ce4fcc900cef8a77627210be9c73ef0d9a01ba5aa7c32c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C7 13600 bytes