Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae14f7838a4cb84…

MALICIOUS

PDF

53.3 KB Created: 2020-08-04 06:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b3d724b9544a96067aaeeea37db892 SHA-1: 83df25c8c28ec9749e6024e9a7e7f1c073df114a SHA-256: 8ae14f7838a4cb841e5367049d206d829960a5bbcf07b0ffff4010f6b9cea1d5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself appears to be a mix of metadata and obfuscated text, including the malicious URL, suggesting the primary purpose is to drive traffic to potentially harmful sites. The ML classifier strongly supports the malicious verdict.

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=agnes+heller+historia+y+vida+cotidiana+pdf
    • http://files.asmileofachildfoundation.org/uploads/1/3/1/4/131407439/3719952.pdf
    • http://files.ktplanning.org/uploads/1/3/1/3/131379280/fbbc1269b.pdf
    • http://files.kevincruise.co.uk/uploads/1/3/0/7/130739062/vodadamud_xiwizavekafi.pdf
    • http://files.michiganmidwife.com/uploads/1/3/1/8/131857916/371c6aa.pdf
    • http://files.ncaeec.org/uploads/1/3/1/6/131637362/xarupolibiranit-segopogil-zarutevowole.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/kenmore_80_series_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8461/1733/files/wesamufomazelavusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/devutomisera.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/prizerebel_promo_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/41457164203.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/takujugilolisavozarami.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/12234224076.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/webojitomuxeboxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8448/files/fowamiwapijip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/favepefimajipazupelekuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/42533485896.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/luziwapipakij.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_off00008f56.bin
51e08308c023259b4fa1c62b7d5c13bf6ed9492122418b79e02504e736b34355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 5568 bytes
font_01_sfnt_off0000a259.bin
311537dc04448c703005feaee67311edf3dec45e7296b4280792f29a294c1b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA259 10908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.