Malicious PDF — malware analysis report

Static analysis result for SHA-256 0365faeaf8bd8443…

MALICIOUS

PDF

37.2 KB Created: 2020-08-01 14:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a28820f4f14c7cef9a4744492e23e17c SHA-1: 65f580bc704c27c90aaa843647c38da225b87759 SHA-256: 0365faeaf8bd8443b10a7f36ca163e7e6f57aa7a95bdd4762fd9b578828da28d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially malicious redirector infrastructure. The primary link, 'https://ttraff.com/pify?keyword=50+hours+of+origami+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to external PDFs, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=50+hours+of+origami+pdf
    • http://files.coljohnbutleruel.com/uploads/1/3/2/6/132682090/f8d2aff487b22.pdf
    • http://files.alluregreaterswiss.com/uploads/1/3/1/6/131606861/1869157.pdf
    • http://files.happydogsestepona.com/uploads/1/3/2/7/132710700/4227128.pdf
    • http://files.essexvet.com/uploads/1/3/2/3/132303286/4778540.pdf
    • http://files.k10research.com/uploads/1/3/1/0/131070633/0701f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/88462809992.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/sasuzojopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/zokasimawuzesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/70787386091.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/finereb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/vigiwijujasupevafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/nozuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/how_to_delete_cards_in_trello.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/5457753284.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/likebelimegobivowulimix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/27424258027.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/xebavemikenovisajige.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051db.bin
6387317ab3fdcf527f604ad07864a43653ba194cb6580a0cd605899e25cba7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DB 5596 bytes
font_01_sfnt_off000064b5.bin
b5829a5c27a7d10128b1a166517141480252b1603cdb2b57d7c2f8a4c5b40561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 10364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.