Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f460131ab1f5f8…

MALICIOUS

PDF

48.5 KB Created: 2020-07-11 16:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed824cc1e974abe062572528cdd02013 SHA-1: fbd29e2eb7c23e88233e2cc3b527effd044de037 SHA-256: 64f460131ab1f5f80854fc7eebaeb4b6f8b523615fda0ef1fbf4aa66ef4c9965
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The document body text, though garbled, contains a URL that appears to be part of the lure, suggesting the document is designed to trick users into clicking malicious links.

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.com/wb?keyword=biology%20books%20pdf
    • http://files.tallsmallproductions.org/uploads/1/3/1/3/131383207/969711.pdf
    • http://files.wicklow.coralleisure.ie/uploads/1/3/0/8/130874541/7906750.pdf
    • http://files.sbcopywriting.com/uploads/1/3/2/7/132740218/644292.pdf
    • http://files.okotokshcpharmacy.com/uploads/1/3/1/4/131408537/muwukuxum-lumuvotaxol-zokezodosebap-luretipinonobux.pdf
    • http://files.medhanialemla.com/uploads/1/3/2/6/132682646/zozilikolajojix_lizeporugowiwad_lopabo_wavarujufomu.pdf
    • http://files.spooksinvestigations.com/uploads/1/3/1/4/131437376/d0a4d.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sotarobimubu.files.wordpress.com/2020/06/bejutaruberap.pdf
    • https://vekesifuwozu.files.wordpress.com/2020/06/nowuzavizurevirori.pdf
    • https://nijarabukexi809583250.files.wordpress.com/2020/06/sekobikolorusewafitu.pdf
    • https://zetimoximuti.files.wordpress.com/2020/06/vedokebabojagunozasefexod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/92194386988.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/38146331871.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/livefonositivaserus.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_off000081f4.bin
587855db0a1a3141537d2252b15ba30864792ff946b73632a1382013d826e535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 4744 bytes
font_01_sfnt_off00009210.bin
c0e6d064b1b8066a6cb48b446ed532ea879cb7a07b0ce06eb29e5906eba19324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 10316 bytes

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