Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ed974ca954c9ef…

MALICIOUS

PDF

47.0 KB Created: 2020-08-11 13:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb484c177880649efcd14be03fb5d92f SHA-1: fd3f3503285b159d3fef54b239dee8949f3a326a SHA-256: 63ed974ca954c9ef2279b5520ca04f1a8c00be9fb3997fcf295d1763a07288f6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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=architectural+drawing+course+free+pdf
    • http://files.ijss-sn.com/uploads/1/3/0/7/130738988/8c9761.pdf
    • http://bexatilo.tylerversluis.com/uploads/1/3/1/1/131163635/gafujasax-kofixojovumibat-kifizofezotonoz-nobudoxifesagap.pdf
    • http://tenugupip.neilandbecci.com/uploads/1/3/1/0/131070109/dapapuvazaba.pdf
    • http://files.emeraldtreeexperts.net/uploads/1/3/0/9/130969427/6706914.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/50114054127.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/netizawisubajesenunewa.pdf
    • https://cdn.shopify.com/s/files/1/0447/9343/0177/files/longman_academic_writing_series_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/18803656753.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/certificado_antecedentes_judiciales_policia.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/gololemaxukakowalejugikul.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/50688655068.pdf
    • https://cdn.shopify.com/s/files/1/0455/6003/7541/files/alcohol_y_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/91827525667.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/fewerojokafufafaxafome.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/17912878701.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/25895463455.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_off000077b4.bin
47aadc4d222348037262adadeea46b8534c51d1384ad72c3feacf99c5189b9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B4 5496 bytes
font_01_sfnt_off00008a73.bin
c4f42538295f88675eff339b42406b4a3927ae72cb4b970926932125fd2b99da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 10684 bytes

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