Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f7dee942c155cd…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 22:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1968d7a6b9c37d6e999f0995bff9bbd7 SHA-1: f30910f40ac0743424a7c5f7035668cbe9a7f67f SHA-256: 14f7dee942c155cd1cdba252b69fc392c9ca701eb40193e44003bc67593c9fa2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link that leads to known malicious infrastructure, disguised as a free dance video download. The ML classifier strongly indicated maliciousness. The document body and embedded links suggest a social engineering lure to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=b+boying+dance+video+free
    • http://files.irieiwaforstudentsinc.org/uploads/1/3/0/8/130814900/tixavi_degujomemugori_kujapapube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/tixujilajasojafemabewafev.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/wobisifapadilomunojip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/kabali_full_movie_hd_720p.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/66683537373.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/52790573711.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6789/files/rilunosutefonukejagovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/gemebuwufozuzikenexejev.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/womuxilujomitiwuliwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/best_academic_writing_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/viwage.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/retina_media_query.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_off0000663c.bin
d7a48882c31b7824ed332ad496d5c0d68eac5256a63ce7f502cce0bd916e6cdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 5328 bytes
font_01_sfnt_off00007876.bin
096c91be79c2f015081e11d63473dab59947197ca0544c718a32273c6d0606da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 10392 bytes