Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccbe8a1a5879ce7…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 20:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 285e7afdfe36395c0a41c653c63a8638 SHA-1: 6894500c1db255f58accd801efbf83d1fa2c2ca3 SHA-256: 5ccbe8a1a5879ce7159981ff96353c13add610bf3e6eb7e824f8f4438ef207d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains the same URL as the primary redirector. This suggests a phishing or scam attempt to drive traffic to malicious sites.

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=wire+size+amp+rating+pdf
    • http://kufevur.truncale.net/uploads/1/3/0/8/130874064/2759669.pdf
    • http://files.newyearsknockout.com/uploads/1/3/0/7/130775850/b1416a.pdf
    • http://files.intervalleyconference.com/uploads/1/3/0/7/130740563/buserokixobopepip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/desukatu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/72703532820.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/68782802130.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/lonosugabilurisebobuwola.pdf
    • http://files.bmaj.rotherham.sch.uk/uploads/1/3/0/7/130740517/5197443.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/nikuwiriresasajamefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/31108240540.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/75830687091.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/81257049190.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/madinedibelos.pdf
    • https://cdn.shopify.com/s/files/1/0441/3816/8472/files/49147150990.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/administracion_hotelera_y_turismo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/71512204057.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/iti_admission_form_download.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_off000076b3.bin
2f3b4ce8bc8317d84c6fcc66f868d2d5032b9cc75e35482453faede1329d0fab
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 5392 bytes
font_01_sfnt_off0000890e.bin
a984b68417bf8a43b1ace28392f9974ba30157c98337240c847ab1d3c2013377
pdf-font-stream PDF embedded font (sfnt) at offset 0x890E 13944 bytes