Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad9cd3e1b83107d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-09 07:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23249119c8e927afdf4c5ddfd9c60f1d SHA-1: a84f30c1f31853d93abf68710d49010c0654adbe SHA-256: 3ad9cd3e1b83107d1f9e4efa32a8ae244ba1200da9535f3300ed888eb9ad16b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=search+pdf+documents+in+folder'. Another heuristic identifies this as a PDF link farm, suggesting an attempt to manipulate search engine results or direct users to potentially harmful content. The ML classifier strongly supports the malicious nature of this document.

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=search+pdf+documents+in+folder
    • http://files.daughtersofthenewmoon.com/uploads/1/3/1/6/131606687/1f3711b0fd.pdf
    • http://files.runbikechaleur.ca/uploads/1/3/1/6/131636957/pakikeno_kasut_kewikawabonivun.pdf
    • http://files.educationfoundationoflm.org/uploads/1/3/1/8/131857419/kamolikex_fereniwalom.pdf
    • http://files.hayeducationgroup.com/uploads/1/3/1/3/131384429/rovuvanedofafenuf.pdf
    • http://files.brightonebikes.co.uk/uploads/1/3/0/7/130775393/namamureka-jojegot-niluse.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/77274911197.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/xinirimiwidevurut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/toribogixitejiguriwobimax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/wipobimubomaxaka.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/37983334715.pdf
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/lineroziki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0450/6569/9478/files/backpack_mod_minecraft_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/geometry_textbook_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6083/files/16497612955.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/saints_row_characters.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/71179957236.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/tekkit_legends_sphax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/minecraft_max_enchantment.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_off000065b0.bin
cd29ca7f286c668890690a8a24b7fb969387e46c0d90d8720c3bd64d2281cd98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 5500 bytes
font_01_sfnt_off00007838.bin
0dc413bd3aa446b4d5ef1c11e4a98342a1255ce5d89a94c39711595a388c3fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 9996 bytes

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