Malicious PDF — malware analysis report

Static analysis result for SHA-256 541b04245b2b7477…

MALICIOUS

PDF

46.5 KB Created: 2020-08-25 06:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 506cb4aeb3f9e40afac33e8431786fbe SHA-1: ca17c9253828be78d375b9be7b1cb04ef609f983 SHA-256: 541b04245b2b7477674a73e0d13406ebe11d3e825915edcecac17f6bb6458cd9
140 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with a primary malicious redirector URL disguised as an 'Adblock plus chrome android extension'. The document also instructs the user to scan a QR code, which likely leads to the same malicious URL. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute malicious content through a link farm. No scripts were extracted, limiting the analysis of further payload delivery or persistence mechanisms.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.cc/pify?keyword=adblock+plus+chrome+android+extension
    • http://files.johnandmorgana.com/uploads/1/3/1/4/131409526/9919148.pdf
    • http://files.beakandpawarts.com/uploads/1/3/0/9/130969190/newotiwekef.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/31429120322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/1079277101.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/water_borehole_drilling_methods.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/14206788908.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/nazobamewus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/altivar_312_francais.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/uttar_pradesh_census_2020_data.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/norapog.pdf
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/crab_rave_sheet_music_trombone.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/bezolesomipomarokuwurada.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_off000075e2.bin
acbc9e5659ee71bf95fbf9410fc2f5ab5717d55604b45d4a26906ee52b2a1dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 5576 bytes
font_01_sfnt_off000088a7.bin
c65fd1c84edfc44798fb605963de5be999ae7f97e5b977f540add17b1de4c34a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 10712 bytes

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