Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8092e07bb1142…

MALICIOUS

PDF

46.7 KB Created: 2020-09-06 10:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae28d8768da75df0755523b8526c6dd SHA-1: 3dad45e9b1291ecc0585eb83d6e0cb66ac77eb3b SHA-256: 07f8092e07bb114261bfbf0886bce5640a279896d3b46187efc5951444688f16
154 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.club/pify?keyword=arithmetic+progression+worksheet+class+10+with+answers`. The document body, though obfuscated, contains references to educational material, likely a lure to disguise the malicious intent. The presence of numerous external links, many pointing to benign content, suggests a tactic to mask the single malicious redirector within a larger set of seemingly legitimate resources.

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.club/pify?keyword=arithmetic+progression+worksheet+class+10+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/87a178_6ee26cfcc9784c34923b9a5a132b3d42.pdf
    • https://static.usrfiles.com/ugd/ab63e3_438ed07156cc413496304efef7976a18.pdf
    • https://static.usrfiles.com/ugd/e4bc37_b60ff11a1eeb4790bf6380eeade78044.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_89aa4b8b07844bd0b042a67129273ff2.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0348/files/monoply_here_and_now_world_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/30332869629.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/skyrim_quick_loot_crash.pdf
    • https://static.usrfiles.com/ugd/b8c837_cee4f5f484134a58a92356ca0dc9fcee.pdf
    • https://static.usrfiles.com/ugd/1e557c_a0c8e4febbe94b18b821eb34e058c9b8.pdf
    • https://static.usrfiles.com/ugd/fd30ac_3dc8470ab44e47a29adbf1af4e7f5c54.pdf
    • https://static.usrfiles.com/ugd/c83fdb_85c2de4238fb4967b3e6c956a73b3432.pdf
    • https://static.usrfiles.com/ugd/191a6d_1381d54b19504d73bc0467a3b02d4821.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_off00007729.bin
3f353aad0c3894e286f07be96c8d502d8506ae95cfd2d20a4764d84fe155e5b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7729 5684 bytes
font_01_sfnt_off00008a6c.bin
e2d4dd565d07682c31abda4fe1546a579ed4df5e90259d70e61902f34bcdb6f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 10352 bytes