Malicious PDF — malware analysis report

Static analysis result for SHA-256 864d14015d14e858…

MALICIOUS

PDF

42.5 KB Created: 2020-08-17 04:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15c222b371fc8754ac754ff41359afe9 SHA-1: cb995db993f2ae2ce274d0f2c730e042ef6c1149 SHA-256: 864d14015d14e858c88e9872524d85b4d8ee5de7d1a05b9443c5d1d0ef620764
162 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a student worksheet, that point to a redirector service known for malicious activity. The ML classifier strongly indicates maliciousness, and the presence of a download button lure further supports a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious 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.ru/pify?keyword=time+management+worksheet+for+students+pdf
    • http://files.riverdining.com/uploads/1/3/1/3/131379035/1770807.pdf
    • http://bepugavi.garlandcountyvote.org/uploads/1/3/1/6/131606289/7912917.pdf
    • http://rajeza.liveactionguideservice.com/uploads/1/3/2/7/132712324/9005384.pdf
    • http://vajob.hearthandcaravan.com/uploads/1/3/2/6/132695384/e100d4de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/fixed_asset_management.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/36405219837.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/57628641686.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/abc_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/6431/6319/files/advantages_of_electronic_ignition_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/mawar_hitam_candra_malik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/fur_elise_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0439/0889/0792/files/exercices_corrigs_d_atomistique.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/aditya_hridayam_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/kenabuvire.pdf
    • https://cdn.shopify.com/s/files/1/0436/9642/3080/files/5960159463.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rexalomofovuwazeb.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_off0000659b.bin
f29c98437cbb2c1d8ee9d82c90ec00a1d41c79a4e20e764167bb7f4e5758f3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 5528 bytes
font_01_sfnt_off00007849.bin
88784d869d55213de486c9b1a33fc01baea84cb2a20b5c570b7c5ddf20783b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 10744 bytes

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