Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cf1402c3bf99d6…

MALICIOUS

PDF

70.5 KB Created: 2020-08-03 16:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 559dcadee21516e573f287f83fb8ea9c SHA-1: 3525105cfed0b1ec72e475308a19bd86ceae015e SHA-256: 08cf1402c3bf99d6ed6c7d154e93c7b59dc4c542f6be70ee6e0aadcd53553781
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure referencing "Haggadah text english pdf" and embeds a large number of links, many pointing to external PDFs. One critical heuristic indicates the primary link leads to known malicious redirector infrastructure. The ML classifier strongly supports a malicious verdict. The embedded content, while heavily obfuscated, appears to contain the malicious URL, suggesting the document's purpose is to redirect users to malicious sites.

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=haggadah+text+english+pdf
    • http://files.wanderlustneverdies.com/uploads/1/3/1/3/131382630/4809050.pdf
    • http://files.hopewwcsbrigades.org/uploads/1/3/2/3/132303068/0ccc287627d799.pdf
    • http://files.multigradeteaching.com/uploads/1/3/1/4/131438557/7050127a73.pdf
    • http://files.tinyhamsterpaws.com/uploads/1/3/1/4/131406202/f6f5a3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/21486023912.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/61141813012.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/bobadepojomivasanovutefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/fetuviteni.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/nutixagog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/40967790676.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/zedaduvewix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/rararumurumamejoxuxiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/95666422732.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/lemedefemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/sexulotokone.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/bulaxulumakaxufataso.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/mozegewadebinupukewom.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/73321678493.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1a2.bin
2b3934a6365f9c3477334003a4e5b1dd43ddb3f8df05858e229f9a2bc72af5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A2 4916 bytes
font_01_sfnt_off0000d24b.bin
2cfc858e72c9aab0f334a1dcef9307519e5661d06b7479698f0713b9d7997321		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD24B 13040 bytes
font_02_sfnt_off0000fe78.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 4324 bytes

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