Malicious PDF — malware analysis report

Static analysis result for SHA-256 0469857d870feee7…

MALICIOUS

PDF

77.4 KB Created: 2020-08-13 00:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17744a378ce53ee8eff68692a358dd32 SHA-1: b439d15f9d7ec3b37116ec04024857cceac5d742 SHA-256: 0469857d870feee77df9260f9a2e2e8288cd9f72a4813e1734d6874b36ec79fc
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to an 'Aramco logo pdf' and includes the malicious URL. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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=aramco+logo+pdf
    • http://fotifufav.glenrockarboretum.org/uploads/1/3/1/1/131164239/9439527.pdf
    • http://tuzesit.hairandbeautybyrochglow.com/uploads/1/3/2/8/132814930/kukevo.pdf
    • http://rifop.featthings.com/uploads/1/3/0/7/130775310/zitimufafeguz.pdf
    • http://daxobif.chippersdesigns.co.uk/uploads/1/3/1/4/131437601/7998843.pdf
    • http://xajil.salveoclinic.org/uploads/1/3/1/4/131407068/6079926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/suvavixobadetubamonara.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/all_important_days_in.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83406059157.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/business_management_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/bachianinha_n1.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/zuzeme.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/folasubapifetagewekuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/adenoma_tubular_de_mama.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/garman_forgue_companion_website.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/joferetugivofototuwajo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc19.bin
c02a22669b72d21753f96d43fd821bcaf74f5bf85dd07d71e58840705e9ec013		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 5284 bytes
font_01_sfnt_off0000ddf4.bin
0626f1b7930c6dd696ebecdb78b9987e90cecb497aba343839125707f4793427		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 15576 bytes
font_02_sfnt_off00010e37.bin
d8590be6067cbdec793c4ceeaba89597cbb4d9df644f4f8a44d3e1e205aa81ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 17376 bytes

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