Malicious PDF — malware analysis report

Static analysis result for SHA-256 2890905f24141462…

MALICIOUS

PDF

35.9 KB Created: 2020-07-09 23:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1abfacfdaf9b3b372cc2d313d829c96a SHA-1: 52b3ad5c55d1fd0d158f47e631981859cadca62d SHA-256: 2890905f24141462e2494416b3debcc171aadec29cc9ff1a1451a949189a24bb
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, presented as an instruction manual, that redirect to malicious infrastructure. The primary redirector URL is https://ttraff.cc/wb?keyword=dpp400w%20instruction%20manual. This indicates a phishing or social engineering attack aimed at directing users to potentially harmful websites. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=dpp400w%20instruction%20manual
    • http://files.neilmckenzieyouthfishingcontest.org/uploads/1/3/1/6/131606127/1963708.pdf
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.pdf
    • http://files.unionkitchenny.com/uploads/1/3/2/6/132681398/b5001f0a3e1.pdf
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdf
    • http://files.photosbycalley.com/uploads/1/3/2/8/132815004/lumin_pusavemutaziwud_zabezupaxuna_refib.pdf
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • http://files.stuartspest.com/uploads/1/3/1/4/131454109/6f09dbbb44d9.pdf
    • http://files.avalonhalethomson.com/uploads/1/3/1/6/131636954/7202992.pdf
    • http://files.teddingtontrust.com/uploads/1/3/0/9/130969085/gixotojikazuxuva.pdf
    • http://files.travel-wisemama.com/uploads/1/3/1/6/131636601/8051551.pdf
    • http://files.barrackvillechurch.com/uploads/1/3/2/7/132741194/tezun.pdf
    • https://mafameruvot.files.wordpress.com/2020/06/83049723187.pdf
    • https://tulagoro.files.wordpress.com/2020/07/bapikixorosa.pdf
    • https://wisubud.files.wordpress.com/2020/06/viwin.pdf
    • https://gapepuzowafu.files.wordpress.com/2020/06/52049234773.pdf
    • https://xeluxaga.files.wordpress.com/2020/07/70714852641.pdf
    • https://webiwubepuno.files.wordpress.com/2020/06/xixositaretaseviriku.pdf
    • https://nubudin.files.wordpress.com/2020/06/14155455321.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.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_off00004dbd.bin
4830007b676558a0ae086ac75f435ab05aa73dd6a056e572c6f6a389845c5e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBD 5164 bytes
font_01_sfnt_off00005f39.bin
901c4b48b2eaf1c37d46e91d4d0241be620905098410faf0dfb6eac6101ed0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 10264 bytes

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