Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f07800e716b2f6a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 17:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bd720e04d5eb5e034d3f636434bab17 SHA-1: b4e6da7b8df0c3879cf2d88e22c677c00e4008ea SHA-256: 5f07800e716b2f6acac52fc56d05df112da08441caf1cbec5d4307cba8b0aa42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent URL, 'https://ttraff.cc/wix?keyword=lufodo+academy+of+performing+arts+tuition', is identified as a malicious redirector. The document's content and structure strongly indicate an attempt to direct 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/wix?keyword=lufodo+academy+of+performing+arts+tuition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/19ce5d_91f3bd7c5f3044248543984c2d7ba102.pdf
    • https://static.usrfiles.com/ugd/b8c837_c20b638aa6674bffbd0ea5704d0f8d8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dae7c95d2ea480b9f0a0079271707eb.pdf
    • https://static.usrfiles.com/ugd/0a51c1_f0dd5fb5bc084a76852c662b97d1cb60.pdf
    • https://static.usrfiles.com/ugd/003b86_2c8010209b8446b78da85156430d2448.pdf
    • https://static.usrfiles.com/ugd/ce77c6_da76a294f10e4e1b8d0eda75e2896789.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/59967912411.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/45998073615.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/5630895211.pdf
    • https://static.usrfiles.com/ugd/5bb01c_46e99df881db470fa3a68989f7ae1c8a.pdf
    • https://static.usrfiles.com/ugd/3b47cb_eba3418075d14de5aa94a23343aab981.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dae.bin
9e300753aebdbbc3248519641e0c0523a18453023f345c689e0dec987db30562
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAE 5488 bytes
font_01_sfnt_off0000704c.bin
88bd844433519472a245378918e6101d464e39dc01ebc531c54acd23dd3255fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 4392 bytes
font_02_sfnt_off00007caf.bin
ee16194b23a2748a8d14a413eaf070a21400c82fecf713bb7335dc9268dd1039
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 10560 bytes