Malicious PDF — malware analysis report

Static analysis result for SHA-256 e215328080e27360…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 01:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 257ea4f41ad773914e1e0fc020c34351 SHA-1: 047387aa6469851f14b8207c28f5a6da29821b3c SHA-256: e215328080e27360f43eeeeb2b256ec50a1d46af8b72f4903823c073cccd2c57
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a large number of URLs. The primary malicious URL identified is https://ttraff.cc/pify?keyword=the+balawat+gates+of+ashurnasirpal+ii+pdf, which likely serves as a gateway to further malicious content. 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.cc/pify?keyword=the+balawat+gates+of+ashurnasirpal+ii+pdf
    • http://files.reslifechurchaz.com/uploads/1/3/1/3/131379343/wiloniweson.pdf
    • http://files.alexlanshe.com/uploads/1/3/1/3/131398555/393286b.pdf
    • http://files.infraredtraining.ca/uploads/1/3/1/1/131164442/rupivezug.pdf
    • http://files.nataliekosnar.com/uploads/1/3/0/7/130776536/28eb1fd32c56.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/5177805181.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/2463614353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/6332761480.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/novijuxemeji.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/94093707048.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/nirokikamivukevewasad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8498/files/canara_bank_online_account_opening_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/govatij.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/guwiwak.pdf
    • https://cdn.shopify.com/s/files/1/0446/7766/0825/files/makalah_teori_behaviorisme.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/xuvuwanulakagolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/bienestar_socioafectivo_de_los_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/botany_mcq_download.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_off000062de.bin
8cd56112a183a3bf0016c4bf1cf9b3849e47646a0cfc417d112583390c007227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 5484 bytes
font_01_sfnt_off00007589.bin
5860948679acf48d4ad332413d3e26f44f5ea6914536e076ffc668996dbfc587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 9940 bytes

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