Malicious PDF — malware analysis report

Static analysis result for SHA-256 263b75fb6369712a…

MALICIOUS

PDF

37.8 KB Created: 2020-08-25 02:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9cab479594fd7958a0caf341756df37 SHA-1: f2ed9e9e0101ea81fc9beb65f8ffdae19449d94e SHA-256: 263b75fb6369712adeac5f990f2285e03077e41d5e35623cf3f9cdaad9464ed5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One specific link, 'https://ttraff.com/pify?keyword=bournside+sixth+form+centre', is identified as a known malicious redirector. This suggests a phishing or malicious content distribution scheme, where the document acts as a lure to redirect users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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=bournside+sixth+form+centre
    • http://dipas.giantcomet.co.uk/uploads/1/3/1/0/131069766/wasaref-rokesiwitogep.pdf
    • http://files.washingtonpedic.com/uploads/1/3/0/9/130968962/gesineserusa_doramekuned.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/70629811143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/71791008842.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/ziletiresolad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/35977676515.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/acrobat_editor_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/mi_vida_loca_episode_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/consumer_reports_all_weather_tire_ratings.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/separation_anxiety_disorder_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jegomebegaxe.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_off000055fc.bin
88c79e3768fdce941ca1d9ef279f68ea62f0e252ba5d86299dd232d1c1a7e88f
pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 5136 bytes
font_01_sfnt_off0000674f.bin
78d8e9cef7a4c6dbde1fc731687892b86c50ba494279ce8811521f776755050f
pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 10468 bytes