Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f31b70cb91d4723…

MALICIOUS

PDF

43.8 KB Created: 2020-07-31 21:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c0ce072e8b90bc0a955c4c60c09c5f SHA-1: 0add79edfa3718c58fc1e2f29f65e87524b37c74 SHA-256: 6f31b70cb91d4723d482259e8e59c012b9aba8a1d2c9cf6f112979b97cbb70a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm designed to generate traffic. One prominent URL, https://ttraff.cc/pify?keyword=axiom+verge+cheats, is identified as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to game cheats, aiming to drive users to malicious infrastructure.

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=axiom+verge+cheats
    • http://files.roots-to-health.com/uploads/1/3/1/6/131636807/9440039.pdf
    • http://files.makwawamalawi.com/uploads/1/3/2/7/132740860/zuder.pdf
    • http://files.globaltreasurypartners.com/uploads/1/3/0/7/130775557/4bcf6.pdf
    • http://files.intensitycheeranddance.com/uploads/1/3/0/7/130776542/ranomalemutobedix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/badoputisokijegigemeta.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/151159444.pdf
    • https://cdn.shopify.com/s/files/1/0437/3954/5761/files/pisusuxililikexogax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/99527909609.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/33058673274.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/78928113856.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20880330559.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/dojexusow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9127/files/74914755020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/ditixilovijejinafese.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/bujozafavafitolakeledafe.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_off00006845.bin
213e9db2ad999906ece2e61f230fde66b2dad257042f3d0f6bb6b4a5123c40dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 5296 bytes
font_01_sfnt_off00007a2d.bin
a0f7d116da996964eb495d21f21290219d2492743cf9cb6d73a890cee9e8ffc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 11816 bytes