Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf24a82c26be16d7…

MALICIOUS

PDF

145.7 KB Created: 2020-08-01 13:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366887e693aaaa3db7fb9cbbdd5ab2bf SHA-1: 408481796554ceeca777afbc32a18e4ff010074c SHA-256: cf24a82c26be16d7fdbccd1b0c3fab2bccfc6e3c3cfaffbf5782fc65c20b25d6
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=top+anime+movies', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=top+anime+movies
    • http://files.balloondecorators.ca/uploads/1/3/1/4/131438120/d08c4.pdf
    • http://files.kcrowell.com/uploads/1/3/0/8/130814636/tawagujoj.pdf
    • http://files.greenwillonline.com/uploads/1/3/0/8/130874469/sobisajagaduzeg.pdf
    • http://files.dtsmidisystems.com/uploads/1/3/0/9/130969761/devisolaluli-titeralamoxuz-wegaparivagi.pdf
    • http://files.memberoftwotribes.com/uploads/1/3/0/9/130969354/3149569.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/46796056137.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/natelabijakugusifor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/77303420519.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/patopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/13802298832.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/diwirosugotasuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/85666882688.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/30016258809.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/25123676595.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/fetozixodapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/27510683748.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/14183719889.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015367.bin
a55a238cd7952101d1e6378167d092baf6c4744305d6b173356814ea91458655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15367 43572 bytes
font_01_sfnt_off0001d999.bin
0e13b299e0b10307316ac4c3e8ff17201dac8c11bdd56b0559eaa84cac680b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D999 4844 bytes
font_02_sfnt_off0001ea0c.bin
fdd410735baa08499cd7ed2d4b96126f56692a3640b6287cee45977c3314a7dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA0C 18980 bytes
font_03_sfnt_off000223dd.bin
89247d3646e3773572243f1d4b0449240b5d7bcbc9865045ac28c7845acd9c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x223DD 16068 bytes

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