Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6a3985ca5e71eb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 21:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e218eeb5d59f119ab49c4490b40e5452 SHA-1: cb2b12c5012151a7b04307dcb76a62db4f909623 SHA-256: 0a6a3985ca5e71eb607964eaf633514c2951b5d12c896e3939f417bbc2529c92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=naina+song+free++ankit+tiwari, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous PDF links and a malicious redirector indicates a likely attempt to drive traffic to malicious or phishing 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.cc/pify?keyword=naina+song+free++ankit+tiwari
    • http://files.jeffellwood.net/uploads/1/3/1/3/131380469/rakoket.pdf
    • http://files.runningembers.com/uploads/1/3/0/7/130739570/5746330.pdf
    • http://files.ddtakingoutthetrash.com/uploads/1/3/1/4/131437919/3940782a64fff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/bekamulolusobepeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/prestashop_modifier_bon_de_livraison.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/sailor_moon_theme_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/range_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/charitable_contributions_federal_deduction_tax_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2067/files/2776386965.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/19062885099.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/97570801406.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/nuvowonusonikozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/ielts_reading_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/83227361469.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/47591336416.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_off00006266.bin
a8363e253da0301017fe73015cef95bf3db59ea0f48e39f8761c68d01ded869d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 5028 bytes
font_01_sfnt_off000073ac.bin
faa6daaf248cb407680c729b244f82398c39a8ffb69ea2e8f1e6090c1e54a8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 13556 bytes

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