Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd543ec30d7be7c3…

MALICIOUS

PDF

37.3 KB Created: 2020-08-19 16:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3790c5298f897469908ec6c8f66d9a28 SHA-1: bfdc6bc98aa7df9e6040b015ee6b00accec7efe2 SHA-256: bd543ec30d7be7c3828028f84c19504a54164b26aa65e160d3397fb29340ccf7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains references to song downloads and the redirector URL, suggesting a social engineering lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector.

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.com/pify?keyword=vivah+song+free++pagalworld.+com
    • http://files.caledontreeconsultants.com/uploads/1/3/0/8/130813095/sogireferem.pdf
    • http://files.mcocoh.com/uploads/1/3/2/7/132741207/gojexonagavi.pdf
    • http://pukajebed.miraribrass.com/uploads/1/3/1/4/131453133/94c9d9.pdf
    • http://gesafigew.bambus-produkte.info/uploads/1/3/1/0/131070859/d8f318.pdf
    • http://kenodu.theonestarsalon.com/uploads/1/3/0/8/130814328/sivubusukivuxibuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/lagofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/79888212422.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/kptcl_notification_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/pizesenapabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/scientific_notation_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/commercial_invoice_template_euro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/8821471177.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/5_steps_to_risk_assessment_hse_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/fijawusupotono.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/65595926242.pdf
    • https://cdn.shopify.com/s/files/1/0435/8248/8733/files/21314517610.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005272.bin
dade7d08e2b400b6f929b178a19d4a9caaaba83a9b603419129275e304a903d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5272 5720 bytes
font_01_sfnt_off000065d5.bin
5b5421b778ea6e03f4b04a5b051753c7c4f8a9b74bd981e165b4d332a9d37355
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 10096 bytes