Malicious PDF — malware analysis report

Static analysis result for SHA-256 579bc42196f9106d…

MALICIOUS

PDF

37.8 KB Created: 2020-09-12 06:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0868fda6e88122e4f2720c9aff962a17 SHA-1: b8e3a8052f47f6b9429da2981a543be5e227a071 SHA-256: 579bc42196f9106d86726ad02677d406539dee44fee61a52d377f6184b6682d6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Netflix 1. 8 1 apk free', suggesting a lure for potentially unwanted software or malware. The PDF_SEO_LINK_FARM heuristic further indicates a pattern of hosting numerous external links, likely for SEO manipulation or to distribute malware.

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.link/wix?keyword=netflix+1.+8+1+apk+free
    • http://saletesi.exploringwithdora.com/uploads/1/3/2/8/132814930/numuginafevix.pdf
    • http://kusel.llanorocknriverfest.com/uploads/1/3/1/4/131407089/5594688.pdf
    • http://files.hairbyshej.com/uploads/1/3/1/4/131437085/5895284.pdf
    • http://files.wheatonhills.org/uploads/1/3/1/4/131454216/pixedulaz.pdf
    • http://files.animaths.net/uploads/1/3/2/7/132740193/gupojomalalom.pdf
    • https://static.usrfiles.com/ugd/a51aec_81b4b02a6b2345588f42dac1725a9c92.pdf
    • https://static.usrfiles.com/ugd/be19e1_2ca45911dd914e00be7a15a2f5520930.pdf
    • https://static.usrfiles.com/ugd/ede58b_f089814cadd3446890698184fedc1eba.pdf
    • https://static.usrfiles.com/ugd/0d089b_a8c18f12f409498a95b2d7ee59fb461a.pdf
    • https://static.usrfiles.com/ugd/99965f_4c0a8ffb386e4c6c834583116a75e9d6.pdf
    • https://static.usrfiles.com/ugd/544e7e_5d9c51795fec44c995d730d2a87966f3.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005751.bin
a80c39e029d57447d6302c15bc68dc2a54e839c1119eb7eff98fc789b068b1ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5751 5096 bytes
font_01_sfnt_off000068d2.bin
3753f8e257092f0ea05998b931fa0c2c116e632fe687f916de5dbed28a71b845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D2 9996 bytes

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