Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb2278ab1c44e9a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-15 03:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e81bc072961a9333a3bf0dcb402809df SHA-1: 7f840ee2808ed332e32cee2834cf6be750950929 SHA-256: 5eb2278ab1c44e9ac9c1f626d10e32efe82a3c8e94779144c6bd4533354fd7a6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text related to 'free powerpoint templates' and the malicious URL, suggesting a lure to trick users into clicking. The presence of many external PDF links, some benign and some unknown, indicates a link farm strategy, likely to obscure the malicious destination.

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.cc/pify?keyword=free++powerpoint+templates+for+information+technology
    • http://files.thepresenteur.com/uploads/1/3/0/8/130815095/wasuti.pdf
    • http://files.feipol.us/uploads/1/3/1/4/131453432/7ed1646abdafe1.pdf
    • http://files.followingthejoy.com/uploads/1/3/0/9/130969424/panavufabemena_kabeburo_vaxuki_mizuvaxoxon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/6373502671.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/20833824196.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/wudutexetovolizevan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/dojuzasex.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/vawakigofanomugejilulop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/zamegapitugolovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43561311815.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/67022765632.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/59110666820.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/dubofudajizagizigusipipef.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/xelisotujipewusen.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/99906366856.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_off000063e4.bin
624a9ad62771d6f3f342f5a981f6fddce2b96cbae324fe5e10e7d3e023a7a6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 5368 bytes
font_01_sfnt_off00007604.bin
641efab4fb6469a7bb12b28baf533df7aa636ec2114dc7c37ee509aa43919ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7604 9836 bytes
font_02_sfnt_off000097a1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A1 4324 bytes

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