Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa369685cb2355f…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 20:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 384e8a2834cf45cefbc74aeb5b63e517 SHA-1: 361773a15104a61c668a352e41ff6d50714e1fc2 SHA-256: 5aa369685cb2355f1fe852b5bd94655d4c34b0701d66593191d6ee8f4383b9fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a critical redirector link to `https://ttraff.ru/pify?keyword=minecraft+butcher+mod+1.+7.+10`, suggesting a social engineering lure to redirect users to malicious content. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, which is a common technique for bypassing macro restrictions and delivering payloads. The ML classifier strongly supports the malicious verdict.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.ru/pify?keyword=minecraft+butcher+mod+1.+7.+10
    • http://posaxiru.columbinepta.org/uploads/1/3/0/8/130873851/44a257398298.pdf
    • http://files.marcschuebellaw.de/uploads/1/3/1/0/131069812/ruvuwogarajemidi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8912/5791/files/embed_from_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/45579860986.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/titukovupegamusadoxidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/38725788203.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/campbell_biology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/jelasimotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/small_business_partnership_agreement_template_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/3164979224.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/21614280997.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0459/7389/7383/files/sofubetatifujidor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cf8.bin
c9b7255a315a69212c687304e0b61a8d9100afcdd0f5a3150972842ffb974685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF8 5504 bytes
font_01_sfnt_off00006f92.bin
82c261f53a4acd8684dc9e1425184ba260fdb992d60c05bb8c7e3949f43d3a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F92 10336 bytes

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