Malicious PDF — malware analysis report

Static analysis result for SHA-256 1380417f7ed76b12…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 13:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5657293615d0062392e50dec63afbce3 SHA-1: ba331b7c4893982e2ce3e2b9cd1a0a91d9c1a391 SHA-256: 1380417f7ed76b12c94dab2ef7c16786cae2de24c62f5973a8d3c3773d69f33d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=behavioral+economics+textbook+pdf
    • http://files.nayadaya.com/uploads/1/3/0/9/130969037/5835489.pdf
    • http://files.orderzeroirving.com/uploads/1/3/0/7/130776743/futetav.pdf
    • http://files.koorsmusic.com/uploads/1/3/0/8/130814611/gisusidodom.pdf
    • http://files.exuviateesthetics.com/uploads/1/3/1/6/131607522/jabob-lanazu.pdf
    • http://dupixeb.rubeenaratcliffe.ca/uploads/1/3/1/1/131164250/zonapubologovotadale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/rurigowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/d_d_5e_hobgoblin.pdf
    • https://cdn.shopify.com/s/files/1/0439/0685/9163/files/caracteres_japoneses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/mr_probz_waves_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/forisobakozitizasok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/13295188793.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/wexuvafepoxuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/riragifopidabenisuvulufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/50372428178.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/buzalubazofamaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/85416934601.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/84555205732.pdf
    • https://unsplash.com/photos/m2iqRdVGprUI
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f7f.bin
c792493edefe1fdc3c3bad87eed2bd8db2b44efb00a6680e59d3379f8f088423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 5564 bytes
font_01_sfnt_off00008238.bin
533f0b266984c1ccaa4519af73b0bbdb18469efc3481285eb2562a8a55810f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 10316 bytes
font_02_sfnt_off0000a570.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA570 4324 bytes

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