Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee04751d21b5bac8…

MALICIOUS

PDF

44.3 KB Created: 2020-10-15 06:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 07273b7414f120520c8267dfc6b9c2ce SHA-1: 9080b3b68d8688686a8cefc7f34ed679cea79f73 SHA-256: ee04751d21b5bac8521633aafbfbc26783c7fd62243540426153b9e5747e37c2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for the malicious URL. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests an attempt to mask the malicious link within a larger link farm, potentially for SEO manipulation or to dilute reputation analysis.

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://ggtraff.ru/123?keyword=geo+slope+2020+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f873a5bda5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f8745f3401b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f871892724b4.pdfIn PDF document text
    • https://site-1038556.mozfiles.com/files/1038556/vuxizakurodivazi.pdfIn PDF document text
    • https://site-1042284.mozfiles.com/files/1042284/defatogip.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/xupurukomakufogo.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn 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/1/0430/6301/7629/files/firefighter_prayer_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/harmonic_motion_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9908/9824/files/engineering_drawing_1st_year_iti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/57275758421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0777/7189/files/82778890116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0612f0-58a8-4191-ab89-b902e8bf14cd/konakuzewekaxalede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4b03ef-17b8-462b-a7ce-f33340f30a12/1269679949.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_off00006f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 5172 bytes
SHA-256: ac63a79f5e4cacab2d1c67bf8cad72faf52aebb9f559776bf1211e4fbc0ce29a
font_01_sfnt_off000080f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 10280 bytes
SHA-256: acde9a5680a6012259dd7e15d8034ba520a3b763a98b84269cd0248ba7c5cf3f

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