Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e70bd04a33219b…

MALICIOUS

PDF

40.3 KB Created: 2020-10-08 01:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 983fee378bc8248545831cf08b151e1b SHA-1: 949757b52176a7b977cc4611b14cbaea35aff040 SHA-256: b8e70bd04a33219bab0cfe4adb934d86ea70c2672230e107be3d8cc7e4ce6be6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links pointing to external PDF files hosted on numerous disposable domains. One of the embedded URLs, 'https://ttraff.club/pify?keyword=plus+belay+method', is identified as a malicious redirector. This suggests the document's primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content, rather than presenting user-readable information.

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://ttraff.club/pify?keyword=plus+belay+method In PDF document text
    • http://sosimes.eastcoastbandogs.com/uploads/1/3/1/4/131407102/a13aefdce661f9.pdfIn PDF document text
    • http://files.bellyacresrvpark.com/uploads/1/3/2/7/132712080/betijogipu_babum_lebiluvaberatoj_dotuduzefazed.pdfIn PDF document text
    • http://files.awgreekshop.com/uploads/1/3/0/7/130775850/deguxi_kenenutolexuwup_karisarev.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/nukidokabop.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/xemenegetupezikepigikume.pdfIn PDF document text
    • https://site-1038958.mozfiles.com/files/1038958/31810082715.pdfIn PDF document text
    • https://site-1038844.mozfiles.com/files/1038844/toraparukigujimuvawafosu.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/mivipo.pdfIn PDF document text
    • https://site-1042841.mozfiles.com/files/1042841/lafokine.pdfIn PDF document text
    • https://site-1039227.mozfiles.com/files/1039227/36412385298.pdfIn PDF document text
    • https://site-1038784.mozfiles.com/files/1038784/pagemazede.pdfIn PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/44864747199.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/2419348994.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/1/0428/6434/5247/files/tuvoxuzom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5296/3742/files/77379885199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4244/6753/files/pevetunudiwix.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_off00005ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBE 5212 bytes
SHA-256: 9c7b78cdbcef054d37fe2e33c94352725648fb2957f27b6fc0e754a5395ef0f5
font_01_sfnt_off00007057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 10628 bytes
SHA-256: 057f583e9843d1669a560e79f466466c4a86318e9373d74566192d0fe4eb2fc0

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