Malicious PDF — malware analysis report

Static analysis result for SHA-256 42130ee75fc52df8…

MALICIOUS

PDF

47.2 KB Created: 2020-08-15 02:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 191da86a7f0c1e98db61f7ac6a0b1205 SHA-1: e2ef49a051a9eeda74ff448c1f9c8bec377ea152 SHA-256: 42130ee75fc52df8b88224d556b758549536625b442a73ecdb16602dbdfb334f
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, indicating a phishing or scam attempt. The ML classifier strongly supports maliciousness. Although no scripts were extracted, the presence of numerous embedded URLs, including a malicious redirector, suggests the document's primary purpose is to redirect the user to a malicious site. The document body contains garbled text and the target URL, reinforcing the malicious intent.

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=b.+h.+m.+s+ka+full+form
    • http://files.unfitmama.com/uploads/1/3/0/8/130814774/5366069.pdf
    • http://files.zetachapterdkg.com/uploads/1/3/0/9/130969097/nozefamizarerapuwe.pdf
    • http://tazof.alexandrathurston.com/uploads/1/3/0/7/130776208/894766.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/cancer_de_lengua.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/73450156921.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/7778268534.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/lubopawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/60500288462.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/35662195451.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/wofejodula.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/67099798058.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/37983426865.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/23712489200.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005595.bin
a7344019b55371461c4b7bea3e4f2b4b8ffc3670333a48c71ef907d6b79add3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5595 4684 bytes
font_01_sfnt_off00006570.bin
9ef1c7a2bc1baf06a39dcd02a3b7f1558f5030279ca9ce39f61c62694738247b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 9936 bytes
font_02_sfnt_off00008776.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8776 4324 bytes
font_03_sfnt_off00009576.bin
e3956f369123715f455e79ab164156a0f564f147233968b56c955628eabf00d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9576 7848 bytes

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