Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db6eca96547a47b…

MALICIOUS

PDF

118.0 KB Created: 2020-10-30 21:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b70d5ec5ecd80271389451bcc5e1b40f SHA-1: e5ccd308ce47d9739a408f5d69f45796b727386e SHA-256: 9db6eca96547a47bbc83252fc298070a082c3f8f6b1a11c97d7a5ef572490fc5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and a known malicious redirector. The document body itself contains the URL 'https://ttraff.club/pify?keyword=maplestory+arcane+symbol+calculator', which is likely intended to trick users into clicking through to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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://ttraff.club/pify?keyword=maplestory+arcane+symbol+calculator In PDF document text
    • https://jugefisofewutep.weebly.com/uploads/1/3/4/3/134368120/jilatigitazi.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/negifedobima_mexute_sezupofizulofum_genumom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f891abb69e57.pdfIn PDF document text
    • https://movulejovem.weebly.com/uploads/1/3/4/4/134470355/67cc2e1a.pdfIn PDF document text
    • https://sudusomot.weebly.com/uploads/1/3/4/2/134265470/kopojudeda_zapuf_lemun.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/zarik.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/pemijedarerazowadeju.pdfIn PDF document text
    • https://benerema.weebly.com/uploads/1/3/1/4/131408328/joraxapu.pdfIn PDF document text
    • https://luxotavazab.weebly.com/uploads/1/3/4/3/134349810/ec7d99579e.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/tufugojijam-fujetijis.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/1/0503/8941/8136/files/incapacitation_criminal_law_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7350/9793/files/iso_9001_version_2015_standard_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1788/5598/files/fm_whatsapp_original_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1537/1413/files/vatiwebajov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4890/0013/files/fokez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5944/4382/files/1418222891.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17811 3136 bytes
SHA-256: 57854f035c7cf00bfa735629c87a19897b0e2e04607e62327357c6699ef86b5d
font_01_sfnt_off00018358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18358 5324 bytes
SHA-256: 6f10bfd18e5c5c470f5856cc726d1947df330ba0ecf359fb2c2ee2a68e73e871
font_02_sfnt_off00019570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19570 16764 bytes
SHA-256: 9dfdea684c2aa6b3f5b0d4c03757515aa4a007967cd231a7875c71380e439546

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