Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3254dfb5c64b2f8…

MALICIOUS

PDF

47.4 KB Created: 2020-08-04 23:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 451444525f92c73ba94fb252b0df65d5 SHA-1: b275959e914107be717838dde230f30f7b17cf40 SHA-256: e3254dfb5c64b2f8ef271fd49ffd515f7def7f6fcbad7235af50e0c051c2ccf8
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to improve search engine rankings, with one of the links pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'chemistry formulas' and the malicious redirector URL. This suggests a lure to trick users into downloading potentially harmful content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=all+chemistry+formulas+for+class+11+and+12+pdf
    • http://files.bedayatlifecoaching.com/uploads/1/3/1/4/131438038/cc8812a02cd.pdf
    • http://files.bicca.org/uploads/1/3/2/6/132681436/bdc8dfe3468.pdf
    • http://files.writinglifebarbaraoneil.com/uploads/1/3/1/1/131164488/nenefubiwurabuwawo.pdf
    • http://files.dancelabnicosia.com/uploads/1/3/1/4/131406785/fubewot_sibobabanunu_gebiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/tedebuvelufajalatuvebona.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/vigejede.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/94931108692.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3063/files/53576181001.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/toworinetavasimilos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/98902356210.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/42120622715.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/wubamurinowiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/pulawumerozuxofezodirin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/wukoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/hoover_windtunnel_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/92891617047.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/87829491616.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_off00007746.bin
f772cb322f6803aa62720857245fa30c32288e9261821e0f8a0ff22c87a09a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 5668 bytes
font_01_sfnt_off00008a77.bin
df4d64b31ed13461ee520670737b105ba25a00381979ab128e4c7b3353ca3486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A77 10460 bytes

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