Malicious PDF — malware analysis report

Static analysis result for SHA-256 172593ce44586e54…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 08:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f607887b66c5a1ee36862537cd663015 SHA-1: 5efcc3de8913f621a4bd2e8dc8859edafb9a8540 SHA-256: 172593ce44586e546c24f557a37f4ac5ef066c3aba8adb05fdf6fc655af59032
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though partially corrupted, includes text suggesting a lure related to 'English podcasts for beginners' and the malicious URL. The presence of numerous external PDF links further indicates a link farm or redirection strategy, likely intended to lead the user to 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/pify?keyword=english+podcasts+for+beginners
    • http://files.prakrutischool.in/uploads/1/3/2/6/132683330/565959fa.pdf
    • http://mipazog.goodshepherdbeaverton.org/uploads/1/3/2/3/132302780/2479347.pdf
    • http://files.coffmannursing.com/uploads/1/3/1/4/131437655/79666.pdf
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdf
    • http://zarupiv.vincentsgermanshepherds.com/uploads/1/3/2/3/132302868/2926444.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/kuzinuwun.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/zagokijuwuxulaxuvupovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/kujisezup.pdf
    • https://cdn.shopify.com/s/files/1/0435/1092/3423/files/bexuga.pdf
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/pasteur_athom_s_mbuma_livre.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/gajezedupevazotaxesojate.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6840/files/28671961429.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/gowawise.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/hp_mini_beats_audio_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0437/5756/8151/files/99890807862.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_off000084d3.bin
2ee030199dd37f371fb74fdd3424d5e22c33fa10b3f2a604a82c5ad7a6fc6475
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 5512 bytes
font_01_sfnt_off0000977b.bin
303c34b8fc961449b15c205d6ab220d67f7c0f6890611b703259aa077b69a165
pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 10464 bytes