Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee0cf2f110fe817…

MALICIOUS

PDF

30.0 KB Created: 2020-10-04 04:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: af250017f1e566f23fc3b61a77b6d4e8 SHA-1: ece1d7ed7cc75266c6f220e8640f899a8ebab26d SHA-256: 5ee0cf2f110fe817bf31d4d1f7b9e3d2471935443fbc97f1a6c61ff7c9d3eb54
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the malicious URL and appears to be a lure disguised as an educational document. The presence of a malicious redirector suggests an attempt to lead the user to a compromised site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=ejemplos+de+densidad+en+la+vida+cotidiana In PDF document text
    • http://files.chsmarketplace.com/uploads/1/3/1/8/131871977/3927535.pdfIn PDF document text
    • http://pujovaxav.chrishendersoncoaching.com/uploads/1/3/1/8/131871479/22b0fdba.pdfIn PDF document text
    • http://files.run4hope5k.com/uploads/1/3/2/8/132815872/jowuwalidevo-demog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8bbef2-eef1-44fe-bad8-c9995ae161b0/1650711190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0828237-67b0-4e44-b5db-1bc2329b1527/vokafemigajemubopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bce223-97b6-4882-a120-0a7bacd7cb45/vesumuvusuwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563b7675-eee2-486d-9cd7-384ba9bf0cc4/26749246895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4689/0393/files/f_words_for_scrabble.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6434/7809/files/faruru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/the_witcher_memes_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/tiny_troopers_2_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/tudukuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5382/1351/files/siviworaberafewujumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/a_guide_to_happiness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2518/6971/files/what_is_knowledge_claim_in_research.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 5216 bytes
SHA-256: da971cdb0dd483bcbdf228e6ae96de59a40ea40cacafef644e38d292c66ef5a7