Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e202079448290c…

MALICIOUS

PDF

52.8 KB Created: 2020-08-18 22:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bc3aeaba2b0c30651f3b309fb192c5f SHA-1: 275f395865390365c2b3443046c49c2a255866e8 SHA-256: f7e202079448290c3f3440a264f9d56d5a914a1136840a2c189de8bca6bf6fb5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive link presented as 'Act 2 macbeth test answers' that redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for phishing. The primary malicious IOC is the redirector URL.

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=act+2+macbeth+test+answers
    • http://mopodu.mrbuddhistory.com/uploads/1/3/1/4/131409090/kogiwezisoluwebaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/11439418272.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/sanesujolawatawebubeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/economia_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0433/0635/2804/files/kototalajefowud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/92775566726.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/61060781187.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/kevujavubuwosiva.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_off0000919c.bin
4e4cd2a6321edadacea7d84b14f7abefa13669cf28b34e0a6cb838a45a1236c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919C 5360 bytes
font_01_sfnt_off0000a3bc.bin
4f76d053459c258b507fc36d4c574993ed5a4fbb44f9a11c8e86a1274d4792f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BC 10164 bytes

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