Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f4086260736f68…

MALICIOUS

PDF

37.1 KB Created: 2020-08-28 06:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1cafe8d3c5137f8163c7ff271830843 SHA-1: 69b2c43bb031c7db8e2edd3fb8de972b1d121547 SHA-256: 28f4086260736f6853727304e9459faf359f93a799121fc4ff533c91568cf888
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to known malicious infrastructure. The document body, though obfuscated, contains a URL that matches the redirector. The primary malicious URL identified is https://ttraff.me/pify?keyword=olafur+eliasson+camera+obscura, which is likely used to lure victims into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/pify?keyword=olafur+eliasson+camera+obscura
    • http://files.grantbomberbarker.com/uploads/1/3/0/8/130814535/wifilubab.pdf
    • http://jixiwa.doreenfarewell.com/uploads/1/3/1/4/131453274/9086289.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/36646828542.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/nurafokodurugojejadovam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/tudeterabomutifinotilas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/fekukuwepibovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/27896949112.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/nefukejuvesuvatogato.pdf
    • https://cdn.shopify.com/s/files/1/0464/9638/3128/files/keto_made_easy_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/22105814551.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_off00005467.bin
0da4f13bb75e255e5d4841348e7058be1e3b01b7a6205cbb1bb111d9fd788f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5467 5196 bytes
font_01_sfnt_off000065f6.bin
29d5039d65d1581d8e614161a7cd0e354952ebd886caee895ae9e8d4c8f1980b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 9908 bytes

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