Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15f53fb97d96ef7…

MALICIOUS

PDF

82.1 KB Created: 2020-09-05 00:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 622ba5b5a6eebf244ccf97197852e5db SHA-1: d23d11e12b79269ef55d37ab9bbeca28e402c76a SHA-256: b15f53fb97d96ef7ac79c9b5ef3a02b218e6207f7c791ecbc0c21031dd09e30a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically a URL designed for SEO spam. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to malicious sites, likely as part of a phishing or scam campaign.

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.club/pify?keyword=bhagwat+geeta+video+song In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/carol_of_the_bells_sheet_music_choir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/42309180129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/57137920560.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_0988c1b4fb704290b45c6d78adbaae7e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d94ae5_bd6337de34594d97bba8fc342b02fd9e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c5d40f_b10058cdb4ac4a6286f3bc259144a6e1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5ecadc_030cda3ae7f54301a966f3c65fb95e49.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/866690_2b0f62e908504600b7b3cd91a70f19c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/952c2e_1313f22caa0f4f0798b218fcd19e13bf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/tefufamuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/coleman_powermate_air_compresser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/malodixiza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 5160 bytes
SHA-256: 04f670c3d67b6931b83a5cc40f0cbcea8780315e0723a73fea1a897bdafb26b9
font_01_sfnt_off00010f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F77 14296 bytes
SHA-256: 48eb139269e50c51419a6fb93a6aac272a2e7870b5eb6740a1edd8fc9dcaeb3a

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