Malicious PDF — malware analysis report

Static analysis result for SHA-256 affcf533caa2cd46…

MALICIOUS

PDF

120.6 KB Created: 2020-08-04 18:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c447278b3fb82f1f08300f5134e1d63 SHA-1: b59f492522581aeb27e6b41a932cec8d6bbe6908 SHA-256: affcf533caa2cd46326daaff3923507e60b7543dc79dca3434a7b9e35f5353ac
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=catechism+of+the+filipino+catholic+pdf'. This URL is embedded within the document body, disguised as a legitimate PDF title. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=catechism+of+the+filipino+catholic+pdf
    • http://files.rachelsvineyardtucson.org/uploads/1/3/1/3/131383664/0714680.pdf
    • http://files.ictfcanada.com/uploads/1/3/2/6/132695554/juvupetuwediziw_pigaw_ditugobusosager.pdf
    • http://files.projectufo.org/uploads/1/3/0/7/130739381/4877757.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/carrier_reefer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/ccdp_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/pelepetividupivew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/warofotapureloxax.pdf
    • https://cdn.shopify.com/s/files/1/0437/1785/3335/files/hirens_boot_cd_15._2.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/46232095859.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/fesotobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/11772608842.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/duxeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/damewumasilagu.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_off000191c1.bin
f73a8e44d1d1b5f6647c043298b47bc5cafeab0a0ddf032305e59c9ec9161a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x191C1 5108 bytes
font_01_sfnt_off0001a2fd.bin
88cc6fb64e21dea8ef5bdddd28f1f99c879c633a4782f194d0e28e8f74ec38e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2FD 10568 bytes
font_02_sfnt_off0001c6ad.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6AD 4324 bytes

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