Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1aa384d29b168d5…

MALICIOUS

PDF

52.2 KB Created: 2020-08-18 20:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3618ac2f834a0d9037af22fe4d09fae9 SHA-1: 8db7f4eec22dc2f8c0a0baf16e1cb7c992e0e026 SHA-256: a1aa384d29b168d5d23a57ae912c208752428dbc62d1dcf3aaa60cce27f7ebb1
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Telugu movies' and a URL that appears to be part of a link farm designed for SEO manipulation. The primary malicious URL is https://ttraff.com/pify?keyword=telugu+movies+2018++hd+jio+rockers, which is flagged as a 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=telugu+movies+2018++hd+jio+rockers
    • http://timineje.aartstudio.ca/uploads/1/3/2/7/132712207/e232486ce86.pdf
    • http://lepifojus.kidney4keisha.com/uploads/1/3/1/4/131408791/9099526.pdf
    • http://mawojatu.westwoodcheer.com/uploads/1/3/1/0/131069915/7144427.pdf
    • http://files.wbphoto.org/uploads/1/3/1/3/131378838/setasepapofowisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1505/3213/files/dimewesoru.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/6613023423.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/zafafakatavamire.pdf
    • https://cdn.shopify.com/s/files/1/0434/6770/2432/files/adp_ireports_w2.pdf
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/awkward_moments_bible.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/kolokodiratavijokifojurol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/nostra_aetate_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/opportunity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/popowodibenog.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/48425564241.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075de.bin
0676bf4089c137c27b5a6e4b4e5a71f105f1b193c01ad7b18cbf38b9c7cdd281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 5812 bytes
font_01_sfnt_off0000899f.bin
46813b8b7d28e6ea1b1f6fa927cc30aa6fd2bc8f8e478aed4c552cc7e3169c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899F 10296 bytes
font_02_sfnt_off0000ace3.bin
b098da79dd067f31ba2c2b8c1c5e919600cd02ab140df2a372f8f699e4c507e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE3 16076 bytes

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