Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd76c90bb72c6587…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 04:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b75da61ca465093e03cc1a265acd9000 SHA-1: 6152b46141fd202fba2b5b5e6f7d16b5aab8d7ad SHA-256: dd76c90bb72c65871fff28bce9a2be7dde6b1de845ca48119c71612bf3ddd20b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.com/pify?keyword=sleep+apnea+guidelines+2018' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to external resources, primarily hosted on Shopify, suggesting a coordinated effort to distribute malicious content through a link farm.

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=sleep+apnea+guidelines+2018
    • http://ruxes.stephanieclaus.com/uploads/1/3/1/8/131872269/2767990.pdf
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdf
    • http://files.ganikowskij.com/uploads/1/3/0/7/130775084/8734867.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/mirekedorojomef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/42595052350.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/marul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/british_english_american_english_tnpsc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/gubumuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/solojob.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/jutomabezijololuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/36541918116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/64651490555.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/sigosajebatubimi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/jukonafidabewofipekejil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/jivewewamekebamavuwojerog.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/
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/jukonafidabewofipekejil.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000681c.bin
462d801ff7bf35a84544ebd4a3afc504bdc6c1fd2e02438c1518f079d445a229
pdf-font-stream PDF embedded font (sfnt) at offset 0x681C 5656 bytes
font_01_sfnt_off00007b6a.bin
119733ec2f194cebac295298c9644d6fdefa3f4903d5c8149489345a551aa1f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 10252 bytes