Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8f70021e351744…

MALICIOUS

PDF

59.6 KB Created: 2020-08-21 14:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1526540235a48122b1ec4a4ad34563b0 SHA-1: 1bd687e07e1aa6df994d2add5f076c2d40cd5184 SHA-256: 3f8f70021e3517443f8c4e621f8574c6fd78c5cc15ebaaeef8b8c65faf44d040
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords like 'Naruto games 2019'. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify. This suggests a campaign focused on traffic redirection and potentially further malicious content delivery. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=naruto+games+2019
    • http://files.ponahealth.com/uploads/1/3/1/1/131164519/vesatoserudebekipap.pdf
    • http://files.salonspamirame.com/uploads/1/3/0/7/130776812/tukiz-vulilazexototig-dojapitu-bufoxoxozoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/83477396289.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/tiwolitumilaxemikepi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0693/0583/files/duffy_blood_group_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/asus_n66u_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/nujeragasaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/5089964463.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/walmart_employee_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/dirulataneki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/carestream_drx_revolution_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/incentive_spirometer_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/nivar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/39760671063.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/35251280798.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000906a.bin
0f130dcbf5877d79fc14daba4d0cb6b3ba47d6e80016e6e4719907ac4cb4559e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906A 3904 bytes
font_01_sfnt_off00009e46.bin
9b242580dd78facc0dc9e701beec3338cd57e48f61cc06f529079eb6d38e6f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E46 5424 bytes
font_02_sfnt_off0000b0ad.bin
37c83de5bddc219e9085130c932afd21828091170ed8932ccbd2d1c50cab1942		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AD 15848 bytes

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