Malicious PDF — malware analysis report

Static analysis result for SHA-256 72497c8ff2bb8b66…

MALICIOUS

PDF

43.0 KB Created: 2020-10-15 10:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd173a45a2de801069291320e340d945 SHA-1: ebd650ce4b621e4d2f2dd79a0c08fe94be63d810 SHA-256: 72497c8ff2bb8b66e2471b8b3c52013085b47cc29171cc107dcffb85c929e49f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector.

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=phrasal+verbs+with+meaning+pdf In PDF document text
    • https://site-1040388.mozfiles.com/files/1040388/24421657565.pdfIn PDF document text
    • https://site-1039253.mozfiles.com/files/1039253/vefuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87aca3cebd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f87b0569ea47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87cef6a10b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f87e1ff3da45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f87e5dd3112d.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/f3c717ff.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/18ad995.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/1/0430/0718/0959/files/siluzuvexuliwiwomepuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7450/8742/files/remedial_teaching_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0520/2591/files/my_maps_help.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a588a7-53a5-4fb4-a47f-c33ee7d91b0d/356712808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb39fd6-b034-4dd9-875f-3391be9dfba0/55366166327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7444e64d-0780-447c-8532-376f78569e5b/xikafoxusasixal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1757a9b-3b5b-413e-b9c1-bbabcebde257/fimokazejedunomigaviwatex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72918a2-7960-4d11-b2da-d41593d1129b/sulomogemowatenime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38601f22-7906-4b97-8eb0-1f54fc469e6b/77134272029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e086f0-2a1a-47a9-ad95-a54b5bea6b69/funodisazoxobafavowas.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_off00006830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6830 5748 bytes
SHA-256: 9e24fd929ff148f1be89f0aa3c7326b1fd5e8e4227da1bc2c2c58af267e466bf
font_01_sfnt_off00007ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA1 10420 bytes
SHA-256: 0cc625d578b50a5e2a4b4cc368d4703371c8c646be8994b28e6db531514a9b4e

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