Malicious PDF — malware analysis report

Static analysis result for SHA-256 d572ce8b4c4ae81e…

MALICIOUS

PDF

48.6 KB Created: 2020-10-15 03:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9c319113ca57c878e1b2513920b99560 SHA-1: 7c8b3a6874b59cdcc5aacdaa116f3839020902ae SHA-256: d572ce8b4c4ae81ea88b60fa45931437bbbb102e7e683907d1e2550cd1fb34f3
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the 'terraria mobile 1.3 apk ios' keyword, suggesting a lure for potentially unwanted software or phishing. The presence of brand impersonation heuristics further supports a phishing or scamming intent.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lefuneni.pdf.
  • 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=terraria+mobile+1.3+apk+ios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f86f67fa867b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8777bedf6ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f87671c80e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f876c483318a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f879a4787081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8772b27cab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f87857fa50fc.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lefuneni.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f871d690523b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f878ea86cb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f87157d7bd18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f87760f2ce98.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/a345be67-5dae-4fbe-b3a7-b6ea2af0d4ba/85616673143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed77c6ef-7ad1-4145-8c16-dec9896b02bb/tuvogapap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d8976d-191e-4a10-a2e8-4aa99f945438/36672432322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd95867-e4dc-4492-844e-afc89400f43b/saludilufimurebala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a381bb-e0d7-4df5-b1c0-597b6d24a718/48052298947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0969/1807/files/nova_legacy_3_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/8886/1342/files/average_income_in_florida_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8563/9061/files/keberuzonoropat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3516/7400/files/new_york_biology_the_living_environment_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/levutovuvalabonilesumoz.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_off00007ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBD 5364 bytes
SHA-256: 1973cd39d877e18b879527149f7097a84c0bc0987c70e22197f884e983ed0eb1
font_01_sfnt_off000090ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EF 10944 bytes
SHA-256: 4361304a8d59e15922736a00f4fd35ca62e963b9cc487d4d0c0a19726f6438e9