Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dcd4be553ae029…

MALICIOUS

PDF

56.7 KB Created: 2020-08-21 06:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f940c15ab1e83f679417737319a3b2 SHA-1: 53264fd66f0ef470c800a44b089524ce91fb70dd SHA-256: 73dcd4be553ae0290a8fbc65055f27fe36fed1e84fe0d664b08fb4fd4d8365ea
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 link farm designed to host other PDFs. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'solitaire game apkpure' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The ML classifier strongly indicates maliciousness.

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=solitaire+game++apkpure
    • http://bifesosew.ctbgbaskets.com/uploads/1/3/2/7/132740373/xakaxog-bumefirotuf.pdf
    • http://files.otteraquatics.com.au/uploads/1/3/0/8/130813796/14b93e75e5fe.pdf
    • http://dikota.journey-well.com/uploads/1/3/1/4/131438641/gunosafotit.pdf
    • http://files.alexandradecandia.com/uploads/1/3/1/3/131379343/9b22d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/mejureziw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/honeywell_thermostat_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4393/files/95515191519.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/dudinoguxaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/muwakoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/dark_souls_2_stats.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/11365950408.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/bmw_z4_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/thyroid_gland_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/6490035790.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/perfect_sara_shepard_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/72317296080.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1240/files/beps_action_2_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ff.bin
ed9a23f4192475de9a996ae8ae336afb2d3da1fbc33c8d1bd75e923aee97c3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 12320 bytes
font_01_sfnt_off00009230.bin
1716a141624cc20cf7a648ace9d512624ababfdf01db430a8b466326fd87eb44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9230 4904 bytes
font_02_sfnt_off0000a2e0.bin
748210df1994c35a2dc9c0e46fb2a0e3dd97560b81995f2649286bebde1f3dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E0 10584 bytes
font_03_sfnt_off0000c707.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC707 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.