Malicious PDF — malware analysis report

Static analysis result for SHA-256 424fb0f7281f1152…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 06:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95bd1cc470a073ef1b3bb7e10807a04 SHA-1: 9f691d22e7f9473e583e424002740a5ad8832351 SHA-256: 424fb0f7281f1152b7cbba301ace2f6292796a1b61a8c522b1590e06257c9ebf
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains obfuscated text and a prominent URL pointing to a redirector service. The presence of numerous embedded links, including the primary malicious one, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dreamweaver+cc+2015+templates
    • http://pivazu.shirleyphillipsartist.com/uploads/1/3/2/7/132712062/nejefijumafug.pdf
    • http://pukilil.adrianeejones.com/uploads/1/3/1/6/131636725/862668.pdf
    • http://xuson.myrules4life.com/uploads/1/3/1/1/131164250/zasisemarit-zowuwodimuf-gasugavewelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/kunomewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/2011_audi_a4_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/58851808140.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/anticoagulant_therapy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/beyonce_video_phone._mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/1569/0650/files/bukhari_sharif_bangla_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9781/files/categorical_syllogism.pdf
    • https://cdn.shopify.com/s/files/1/0433/3997/2773/files/briggs_and_stratton_outboard.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/51901635843.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_off0000625a.bin
fc2eb127607356574955c74200202a175241432600b6dc9bbaed8108c7bcceb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 5680 bytes
font_01_sfnt_off000075b6.bin
3e14a594ec053c2d8ad32cbddaa006f7f813219fc876e1d326ed136ce9538a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 9964 bytes

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