Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b32ae7124226b7…

MALICIOUS

PDF

58.5 KB Created: 2020-08-10 20:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c0140ee6233ec6c9785fb8eacebd21a SHA-1: 722802bf8a79b3de9d91dca93bca8c46be0945be SHA-256: 72b32ae7124226b7a807962da00f90e9d452952c197b62100de4a23539db79bb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure and embedded links indicate a malicious intent to redirect users to harmful content.

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=capteur+inductif+fonctionnement+pdf In PDF document text
    • http://files.myonnapetty.studio/uploads/1/3/1/3/131379510/2626082.pdfIn PDF document text
    • http://files.imagemaycontain.com/uploads/1/3/1/8/131871569/ponulunevibonem.pdfIn PDF document text
    • http://files.ritchandyvette.com/uploads/1/3/1/6/131637419/manelawiro.pdfIn PDF document text
    • http://files.greenlandscapescornwall.co.uk/uploads/1/3/0/8/130813747/pasiwatozenajap-zuwozinow.pdfIn PDF document text
    • http://files.annadivesta.com/uploads/1/3/0/7/130740298/sadutogi_xanife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/47178356078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/adobe_indesign_cs3_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/badewoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/free_flip_book_maker_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93366398369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/adenosina_bula_hipolabor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/43334423704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/1728277294.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000949c.bin
9cb4d613fcc20c52722bb1eabc4992559b8a88d03f536247d92903c7e12d9807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x949C 4996 bytes
font_01_sfnt_off0000a588.bin
855ec5ad474babd29c571d5f56b8fc2d78836a6bd2bd18936845a9a80a932859		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA588 12572 bytes
font_02_sfnt_off0000ccf3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 4324 bytes

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