Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c597b5a5b5b5e41…

MALICIOUS

PDF

37.9 KB Created: 2020-10-03 21:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40ebebae5b10f979941491cac29dc54d SHA-1: 1601b83cd5d31dfc2421e98ec23ca4739128ffa1 SHA-256: 9c597b5a5b5b5e410f6a4d33b3dca0695159d413ded646032de54751c33c2003
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. The primary malicious URL, https://cctraff.ru/strik?keyword=playhouse+disney+stanley+games, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious or spam content, aligning with spearphishing or SEO manipulation tactics.

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://cctraff.ru/strik?keyword=playhouse+disney+stanley+games In PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/piwagudi.pdfIn PDF document text
    • https://site-1041085.mozfiles.com/files/1041085/wujamedaguveledajiramilo.pdfIn PDF document text
    • https://site-1040438.mozfiles.com/files/1040438/57427991426.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/tapasew.pdfIn PDF document text
    • http://logimikog.shafronchef.com/uploads/1/3/0/7/130775403/segarelomabi-lefamorosewigat-livizuzewa-lafote.pdfIn PDF document text
    • http://files.georgelloyd-jones.com/uploads/1/3/1/3/131398149/pugezuvegotidobonol.pdfIn PDF document text
    • http://noburul.winhornetswin.com/uploads/1/3/1/4/131406663/012c8d2a2151b.pdfIn PDF document text
    • http://waverafa.jacquifernandez.com/uploads/1/3/1/1/131163653/likeravosu_wanizukuwap_zanasid_tatuman.pdfIn PDF document text
    • http://devagog.staugustineofcanterburyhecker.com/uploads/1/3/1/4/131437987/33610ae1dda3.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/1/0431/6866/1670/files/32707742838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/william_smith_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8155/4325/files/98708249281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5167/4531/files/bl2_tunguska_any_good.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0321/5778/files/relinquish_rights_to_property_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/next_level_basketball_aau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3548/3551/files/nyu_mobile_print_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/pumilefakatekiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8990/7878/files/lizageperabug.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_off00005729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5729 5248 bytes
SHA-256: 30582f4d124bbf2248fd3e0611dd9b680d6475092cc1634bb5c34ca25dcd5b33
font_01_sfnt_off000068e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 9900 bytes
SHA-256: b731e3992568914c3e50cca77947e8bf1846458171ffc15cfd8266a221e4048d

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