Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf550429f7d24a0…

MALICIOUS

PDF

47.8 KB Created: 2020-10-16 01:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4fd77bdd07a36d1f49cf01bdc48d847c SHA-1: e7389730c6eb943d13a9d9762d9545fefd24135e SHA-256: 4cf550429f7d24a08cbab2796041cf942e8540e172c808d0613dac973a05be92
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=real+numbers+whatsapp+apk+download In PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/wanunup.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/jilakimagib-nenosi-bofuzinawi-kiwodifizuke.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/f2aeea.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/nimedejeki.pdfIn PDF document text
    • https://site-1044057.mozfiles.com/files/1044057/90739579973.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/79754039246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f273d04-7632-4f73-a611-90ffa466b589/93346669099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f7c2c1-51f4-4ff5-8190-bf7672f9697f/mobepemukofegole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd898a68-0639-49a0-b3cd-f05686a004ab/felituwezalofidenugejome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfd71fb-d4ba-4fd9-b945-fc4dcf4fc96f/zarori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1ab30d-efd6-4afe-b328-1aae77d924e7/lavaterisukugezuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/58384521407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/63764505027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0976/9111/files/ludemoferoboso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2642/2696/files/28449416664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/matavobaxefabitulamerul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9307/7405/files/spirited_away_reprise_violin_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3080/7196/files/87251289417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/wedo_2.0_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/neverending_story_book_replica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3f112e-a30e-4c47-bc12-1df979407759/revepidemavasatikozajal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f9042a-7596-4b94-8df3-f08f9e3f9630/xufuwebumewatuzil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062c0939-3aab-4279-a23b-84a71e0ab46e/seruxolifufekavupiwidir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1a1c99-e6d5-4ca5-add9-26556334ebf9/19325817876.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 5500 bytes
SHA-256: 868e902235ce6f1d9cd6633b3d17a4fb2d52d4e679a930fb77e1186673bdea47
font_01_sfnt_off0000756b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 10144 bytes
SHA-256: 37bbb3c1d296bb9bbdbef501f77e5d85086dbb094214cdf5b636634b48fc7970
font_02_sfnt_off00009850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9850 17024 bytes
SHA-256: 2424d0f6f6f5ba3f97f57ab60fa04b4c798bbb490a5f66138fca2999fea1d641