Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74b1b3dca648397…

MALICIOUS

PDF

65.8 KB Created: 2020-08-08 15:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58f6aa6e2c2ae966e2867ca3212023b1 SHA-1: 3ede704cae483cd31049c16670546aafea819c31 SHA-256: e74b1b3dca648397e57abf3dec13a4da7385a0b12238701acbf4147842be3190
120 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=anemia+perniciosa+causas+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into clicking the link. The presence of multiple external PDF links further indicates a link farm strategy, common in SEO poisoning attacks.

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.com/pify?keyword=anemia+perniciosa+causas+pdf
    • http://files.mveanow.org/uploads/1/3/1/6/131606594/8a4e6cb4.pdf
    • http://files.shieldedhearts.org/uploads/1/3/1/1/131164572/ridaxe-kebijurarine-gonamodazonozep.pdf
    • http://nibiki.onionmanproductions.com/uploads/1/3/0/8/130874633/5a480d7987f9819.pdf
    • http://files.tmwsports.co.uk/uploads/1/3/2/7/132740536/gekemawoto.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/14204645319.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/28397604485.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/nefesuxafapefewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/f_b_service_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/kozagitefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/73785182453.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/sibiromijojenunoveke.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/63083119940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/15283489520.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_off0000c0ec.bin
91a39ff28cd058665e5aaee9196c3eea20a681d14244e09c7d8f3562fda07a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EC 5260 bytes
font_01_sfnt_off0000d2b1.bin
213536033926bec65d201e109305f6bc6a529729ab0929edd98a5abda84f468c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B1 11628 bytes

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