Malicious PDF — malware analysis report

Static analysis result for SHA-256 719e5682c39ff63e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 23:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3319194fe1901b29b1f2998249d478ab SHA-1: 2c091600bd481440b5be0074bc382b61e717ad41 SHA-256: 719e5682c39ff63eb78719a4e7bcf6162f114ae61cf0e3b78a81b6604d71ff48
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/wb?keyword=la%20pedagogia%20del%20oprimido%20pdf%20libro`. This infrastructure is known for malicious redirection, likely to phishing sites or to download further malware. The document body and embedded artifacts do not contain executable scripts, but the presence of numerous external links suggests an attempt to distribute or redirect users to malicious content.

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/wb?keyword=la%20pedagogia%20del%20oprimido%20pdf%20libro
    • http://files.lirielbijoux.com/uploads/1/3/1/4/131438056/73972c6bee0434.pdf
    • http://files.masiuliai.com/uploads/1/3/0/8/130813756/burom.pdf
    • http://xutuvif.sherileegray.com/uploads/1/3/1/8/131871478/gojagosixaro-wowur-zevumenifu-nutepet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/nesitovomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/neural_networks_and_back_propagation_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4888/4634/files/39746031542.pdf
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/gta_san_andreas_cheats_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/bekizepijogivobumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/jodopewukozoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/nesopapozugowefarafof.pdf
    • https://cdn.shopify.com/s/files/1/0436/0041/2835/files/advanced_java_multiple_choice_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/dasupadovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8504/files/brodong_tua_mp3.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_off0000645d.bin
f8b9cc11dcd0e3dcf1716abce3400948bbb204d3e28105f1a273d969ce90a4d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 5264 bytes
font_01_sfnt_off00007632.bin
5767c448ab940f510dec1f299cc86134511b3685af8ad2f6e4af3b23b92c168b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7632 10840 bytes

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