Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e1e8e2a378d333…

MALICIOUS

PDF

35.2 KB Created: 2020-08-29 21:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32c603b8e39df3494651d9622efb485c SHA-1: 713bf8c6efec470acaa692f51bd8cd2ee0975457 SHA-256: 11e1e8e2a378d3330dad0b9926d87f98178a41754a586a4e0dc8f8558ce5528c
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute further malware. The document also hosts a large number of links to other PDF files, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate a phishing or malicious content delivery attempt.

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.ru/wix?keyword=folren+riven+calculator
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2264/5408/files/hunger_games_book_1_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/business_proposal_sample_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/56258956717.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/23557516986.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/518017536.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/asteroseismology_aerts.pdf
    • https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdf
    • https://static.usrfiles.com/ugd/f0f215_da8ef55d43054e52b9be6a0537408a18.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad78fa24dd2d46dcaa99271bdc585643.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70d14e4017c4f3e9b472845f8e7e8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875483a2744488dac7ae11cefa3fc74.pdf
    • https://static.usrfiles.com/ugd/696b8a_aeab78dc1d5644cfb4ef66026fd819db.pdf
    • https://static.usrfiles.com/ugd/b8c837_08fbd5b9431e4dfbb9b472a198dd8d3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a33d3cda790a4d43ba951291a5ab1ebf.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_off00004d0e.bin
a7ca6cf8170e47d8ed5c294f90547b11f60e308879f261a15340430f5c5f79dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0E 4628 bytes
font_01_sfnt_off00005cd8.bin
36ede926b9051594de14d04cc8c8f3fc9c0c6961178dbf8752def8c2e36f9e0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 10340 bytes