Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c30bb20fbab8aca…

MALICIOUS

PDF

57.9 KB Created: 2020-07-10 10:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18d3772dd7fc2d01eb269596cef92c74 SHA-1: 846eb7fa472440b9c5210fe892eb805fe34ceb34 SHA-256: 8c30bb20fbab8acaf335ddd79f8b36ad71a07b54587444fd39e5d7b7d089896c
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, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document appears to be part of a link farm or SEO manipulation scheme, likely designed to drive traffic to malicious sites or to host further malicious 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.ru/wb?keyword=ontology%20definition%20philosophy%20pdf
    • http://files.bs.shenfieldlearning.com/uploads/1/3/2/7/132740384/fudovosakiwitosuputi.pdf
    • http://files.tonimcgraw.com/uploads/1/3/0/9/130969209/5dc69b4e4c1768.pdf
    • http://files.meganhealymusic.com/uploads/1/3/1/4/131438642/pewopiwes-kijorinasiwobog-xixuwilemo-fegaza.pdf
    • http://files.chenowethbairddesign.com/uploads/1/3/1/8/131871894/kawal_fudomur.pdf
    • http://files.busystatic.com/uploads/1/3/0/7/130739836/tirawolaju.pdf
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdf
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.pdf
    • http://files.thewayyoucook.com/uploads/1/3/1/4/131438611/bigakapamajekom_loxev_guvefitikok.pdf
    • http://files.sachagrosselart.com/uploads/1/3/0/9/130969209/belizifimekedaxuwuzu.pdf
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131452840/fekobagedetip-rujegajobe-tibuz-zubonafanewuwi.pdf
    • https://garitusupodi.files.wordpress.com/2020/06/wiruzis.pdf
    • https://telezeguraka.files.wordpress.com/2020/07/7507300929.pdf
    • https://japisez.files.wordpress.com/2020/06/76005340557.pdf
    • https://xezifemubet.files.wordpress.com/2020/06/debuvibuluxijakeg.pdf
    • https://molejupo.files.wordpress.com/2020/06/xaluzepinujago.pdf
    • https://wozokaju.files.wordpress.com/2020/06/xenunekukatowubodadesanup.pdf
    • https://xisipitojeg.files.wordpress.com/2020/06/17195456951.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.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_off0000a6df.bin
9ae4f7c28e895c567ee53b4cf0a90a81c32c8bf016ea48731cc8688121a188b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DF 4916 bytes
font_01_sfnt_off0000b7a5.bin
7a961b23757f50031dd4709c80833375d1795eeb9838990c5cfc661d76cac8be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A5 10144 bytes

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