Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96d717d83f85f13…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 07:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f705154b7d03b3a47b0ca865fe868665 SHA-1: ef1f05efd415c959a5cbd80b163782705b020a85 SHA-256: b96d717d83f85f13c4dc3e643b34b458b7d1d546fc105c7cf16a76820706d615
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link identified is https://ttraff.cc/pify?keyword=sublime+text+multiple+cursors, which is known to lead to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an intent to redirect the user to potentially harmful content.

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=sublime+text+multiple+cursors
    • http://loluze.diversifiedfixture.com/uploads/1/3/1/3/131383297/nofukitave-daloxavurek-jomebewepofil.pdf
    • http://kekunebug.geo4u.net/uploads/1/3/1/8/131871984/tuwanizovarur_garopojiferadap_nuvedojupe.pdf
    • http://files.studiojenniferwade.com/uploads/1/3/1/1/131164100/7578661.pdf
    • http://files.englishtheatrecompany32.fr/uploads/1/3/1/3/131383581/942023.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/roduzubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bowojazepedesawixebi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/borupoxemunelajugawune.pdf
    • https://cdn.shopify.com/s/files/1/0433/7722/9982/files/zabukotajelojatulid.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8526/files/nesofagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1180/0220/files/pronunciation_activities.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/82128397911.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/81282593510.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/puwisana.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/finodoreguxajujakitofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/35105181356.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/80889012176.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_off00005f15.bin
8a5f5f91eed4c9b139d96ae3a4bc07546ad65a89541f91b4f3e71e0bcd34a253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5180 bytes
font_01_sfnt_off000070a0.bin
7d34607a2c86835b22e1fa50a4dbef855b230161bd47a44d007798642433607c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 10292 bytes

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