Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a4f7f3b291bf64…

MALICIOUS

PDF

55.4 KB Created: 2020-07-21 08:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec9b87fbe3442ee0425dd393bb1ed128 SHA-1: 3e762878ff6b1b3b371f0d03e2ddca51866a5c6b SHA-256: 17a4f7f3b291bf641b8ea6fba039e4b44d37771740ab4dd334c2186fedd6229b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=indicaciones%20de%20surfactante%20pulmonar%20pdf
    • http://files.mauisreef.com/uploads/1/3/2/7/132740637/lijukibakubeve_wusevewol_xusevojekew.pdf
    • http://files.msseniornyecounty.com/uploads/1/3/1/4/131438528/8184698.pdf
    • http://files.behuninvocalstudio.com/uploads/1/3/0/9/130968994/2496227.pdf
    • http://files.tandesoleilmorrobay.com/uploads/1/3/0/7/130775655/pumagesive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9930/7678/files/gazeririgeduwabifopoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/kudoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/gonobovojapemelawusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/pewul.pdf
    • https://welibawone.files.wordpress.com/2020/07/17555937066.pdf
    • https://zunuxav.files.wordpress.com/2020/07/23358756132.pdf
    • https://momunijubu866698461.files.wordpress.com/2020/07/vomuvinumel.pdf
    • https://figodop.files.wordpress.com/2020/06/76502322667.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/xovimumuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/wivaxuwuzibiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/rupolabupejedipopav.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/23824465910.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevesuladufutaniwor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/lowosizozo.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_off000099ed.bin
e46c47126a72f1bdef9a436a06b9144028ac598b97af8fad1bcf01518408082b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99ED 5120 bytes
font_01_sfnt_off0000ab32.bin
da20ee53213db55d454bf59b74ce6f057b85eec1b95e8378dad86332c2ff7234		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB32 10760 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.