Malicious PDF — malware analysis report

Static analysis result for SHA-256 740d4afcdbd0441b…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 14:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e7460c1670bd9fb7391b1bee3d2d32 SHA-1: a5e3f1e60bb6f3ebd1b2e93dff9aa88c39f4d930 SHA-256: 740d4afcdbd0441b4bba530bfba1918edd3fb3e5b098e1677a4ba47d8566e7e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a PDF link farm. The primary link directs to a known malicious redirector infrastructure. The document's content, though obfuscated, appears to be a lure to encourage users to click these links, likely leading to further malicious content or phishing attempts.

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=funciones+de+los+nervios+craneales
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_88337e4664b04b30ac83f69ffabd745e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4e04f21505544158beec3e0f7d96925.pdf
    • https://static.usrfiles.com/ugd/2c8d66_b6f9142171d440c0abfa4627803cb88c.pdf
    • https://static.usrfiles.com/ugd/9757e7_3dbe5be52206460d9e94245205ad70bd.pdf
    • https://static.usrfiles.com/ugd/90423f_dca4d1a8d79849498bfddfb2e02d812e.pdf
    • https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
    • https://static.usrfiles.com/ugd/83e24f_3128cedd5fe64a7fb845ba794eda6dae.pdf
    • https://static.usrfiles.com/ugd/b8c837_736f5ea4b2b1488188eed9c4b98ec757.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd683b0eeb184becba5b53404da3e5b5.pdf
    • https://static.usrfiles.com/ugd/162fe6_96d1f5fe781d414d9756437652d3c751.pdf
    • https://static.usrfiles.com/ugd/b8c837_03b79bbc41cb40b0a2e6c983721a8b59.pdf
    • https://static.usrfiles.com/ugd/97634b_437483d6ada84250947e4564235b2333.pdf
    • https://static.usrfiles.com/ugd/345929_b4dee03d25634abd905b7bfd72951676.pdf
    • https://static.usrfiles.com/ugd/8b2c09_26413d28c66b403d943c97385fd34698.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6516d8ffd5c4fc8942484cde4ea3668.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03a6793e02f4809b9ac1deb844edc49.pdf
    • https://static.usrfiles.com/ugd/b8c837_9acc212e5ff740a98d511d212432a204.pdf
    • https://static.usrfiles.com/ugd/5ecadc_3a6dd9ef4be045d0a029776f189765e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_62f7516c7cd449afbe5ac4d0c779555f.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_off00006a5a.bin
00456f71a46e368665e1d4b360ccdf7902533d2b194ad41dd00201df7178940e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5A 4948 bytes
font_01_sfnt_off00007b39.bin
9b7f43c0c4f580508b8dbeaa59f7a0de5dc2aab898eff6fac83fbe9a21c42975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 10748 bytes

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