Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3e22e5d1f1f342…

MALICIOUS

PDF

33.7 KB Created: 2020-08-18 17:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b70193eb92a198dcc3df032e139a47a SHA-1: 6aecff19d4dcf31f05f44c2b7e9e44f4ee7470f0 SHA-256: 6a3e22e5d1f1f342ebd28edfb856e6a3c4f9f8f832b9bc0b8eb048891cbc8f34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external resources, and one critical link to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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=abcd+2+vande+mataram+dance+performance
    • http://files.invernessvineyard.org/uploads/1/3/0/7/130775138/5049674.pdf
    • http://files.salmanhashmi.com/uploads/1/3/1/6/131637219/05c67dfa.pdf
    • http://files.estherlankhaar.com/uploads/1/3/0/7/130739916/a077e21fb4.pdf
    • http://tinajuge.touchofhaven.ca/uploads/1/3/1/3/131381464/8290921.pdf
    • http://files.depressionwillfade.com/uploads/1/3/0/7/130776487/7040720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/vim_replace_with_new_line.pdf
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/tizotomokeges.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/28989587854.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/buku_instrumen_akreditasi_puskesmas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/97516062658.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/how_the_mighty_fall_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/gifamivivajubosukusofuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/jozide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/vosofobipajagaxarezupugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/85124853765.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/kiponoduzog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/manual_usuario_audi_a3_2017.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_off0000475f.bin
b8f38b1539141a98c4e0beab321842a27f61823fe8c44ed764d1afefc5c2b299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x475F 5412 bytes
font_01_sfnt_off000059ae.bin
aa166ed97d097e4781f52c9bf8b6639bcc60096630adf86f1acbe5cabe6a925d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AE 9332 bytes

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